# Quick Beginnings

# Installing the First AFS Machine

This chapter describes how to install the first AFS machine in your cell, configuring it as both a file server machine and a client machine. After completing all procedures in this chapter, you can remove the client functionality if you wish, as described in Removing Client Functionality.

To install additional file server machines after completing this chapter, see Installing Additional Server Machines.

To install additional client machines after completing this chapter, see Installing Additional Client Machines.

## Requirements and Configuration Decisions

The instructions in this chapter assume that you meet the following requirements.

- You are logged onto the machine's console as the local superuser root

- A standard version of one of the operating systems supported by the current version of AFS is running on the machine

- You can access the data on the AFS CD-ROMs, either through a local CD drive or via an NFS mount of a CD drive attached to a machine that is accessible by network

You must make the following configuration decisions while installing the first AFS machine. To speed the installation itself, it is best to make the decisions before beginning. See the chapter in the IBM AFS Administration Guide about issues in cell administration and configuration for detailed guidelines.

- Select the first AFS machine

- Select the cell name

- Decide which partitions or logical volumes to configure as AFS server partitions, and choose the directory names on which to mount them

- Decide whether to use the standard AFS authentication and authorization software or Kerberos as obtained from another source. On several system types, the decision determines how you incorporate AFS into the machine's authentication system. If you wish to use Kerberos, contact the AFS Product Support group now to learn about how you must modify the installation procedure.

- Decide how big to make the client cache

- Decide how to configure the top levels of your cell's AFS filespace

This chapter is divided into three large sections corresponding to the three parts of installing the first AFS machine. Perform all of the steps in the order they appear. Each functional section begins with a summary of the procedures to perform. The sections are as follows:

- Installing server functionality (begins in Overview: Installing Server Functionality)

- Installing client functionality (begins in Overview: Installing Client Functionality)

- Configuring your cell's filespace, establishing further security mechanisms, and enabling access to foreign cells (begins in Overview: Completing the Installation of the First AFS Machine)

## Overview: Installing Server Functionality

In the first phase of installing your cell's first AFS machine, you install file server and database server functionality by performing the following procedures:

1. Choose which machine to install as the first AFS machine

2. Create AFS-related directories on the local disk

3. Incorporate AFS modifications into the machine's kernel

4. Configure partitions or logical volumes for storing AFS volumes

5. On some system types, install and configure an AFS-modified version of the fsck program

6. If the machine is to remain a client machine, incorporate AFS into its authentication system

7. Start the Basic OverSeer (BOS) Server

8. Define the cell name and the machine's cell membership

9. Start the database server processes: Authentication Server, Backup Server, Protection Server, and Volume Location (VL) Server

10. Configure initial security mechanisms

11. Start the fs process, which incorporates three component processes: the File Server, Volume Server, and Salvager

12. Start the server portion of the Update Server

13. Start the controller process (called runntp) for the Network Time Protocol Daemon, which synchronizes machine clocks

## Choosing the First AFS Machine

The first AFS machine you install must have sufficient disk space to store AFS volumes. To take best advantage of AFS's capabilities, store client-side binaries as well as user files in volumes. When you later install additional file server machines in your cell, you can distribute these volumes among the different machines as you see fit.

These instructions configure the first AFS machine as a database server machine, the binary distribution machine for its system type, and the cell's system control machine. For a description of these roles, see the IBM AFS Administration Guide.

Installation of additional machines is simplest if the first machine has the lowest IP address of any database server machine you currently plan to install. If you later install database server functionality on a machine with a lower IP address, you must first update the /usr/vice/etc/CellServDB file on all of your cell's client machines. For more details, see Installing Database Server Functionality.

## Creating AFS Directories

Create the /usr/afs and /usr/vice/etc directories on the local disk, to house server and client files respectively. Subsequent instructions copy files from the AFS CD-ROM into them. Create the /cdrom directory as a mount point for CD-ROMs, if it does not already exist.

       # mkdir /usr/afs

       # mkdir /usr/vice

       # mkdir /usr/vice/etc

       # mkdir /cdrom

## Performing Platform-Specific Procedures

Several of the initial procedures for installing a file server machine differ for each system type. For convenience, the following sections group them together for each system type:

- Incorporate AFS modifications into the kernel.

  The kernel on every AFS file server and client machine must incorporate AFS extensions. On machines that use a dynamic kernel module loader, it is conventional to alter the machine's initialization script to load the AFS extensions at each reboot.

- Configure server partitions or logical volumes to house AFS volumes.

  Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes (for convenience, the documentation hereafter refers to partitions only). Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. By convention, the first 26 partitions are mounted on the directories called /vicepa through /vicepz, the 27th one is mounted on the /vicepaa directory, and so on through /vicepaz and /vicepba, continuing up to the index corresponding to the maximum number of server partitions supported in the current version of AFS (which is specified in the IBM AFS Release Notes).

  The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location).

  You can also add or remove server partitions on an existing file server machine. For instructions, see the chapter in the IBM AFS Administration Guide about maintaining server machines.

  Note: | Not all file system types supported by an operating system are necessarily supported as AFS server partitions. For possible restrictions, see the IBM AFS Release Notes.

- On some system types, install and configure a modified fsck program which recognizes the structures that the File Server uses to organize volume data on AFS server partitions. The fsck program provided with the operating system does not understand the AFS data structures, and so removes them to the lost+found directory.

- If the machine is to remain an AFS client machine, modify the machine's authentication system so that users obtain an AFS token as they log into the local file system. Using AFS is simpler and more convenient for your users if you make the modifications on all client machines. Otherwise, users must perform a two-step login procedure (login to the local file system and then issue the klog command). For further discussion of AFS authentication, see the chapter in the IBM AFS Administration Guide about cell configuration and administration issues.

To continue, proceed to the appropriate section:

- Getting Started on AIX Systems

- Getting Started on Digital UNIX Systems

- Getting Started on HP-UX Systems

- Getting Started on IRIX Systems

- Getting Started on Linux Systems

- Getting Started on Solaris Systems

## Getting Started on AIX Systems

Begin by running the AFS initialization script to call the AIX kernel extension facility, which dynamically loads AFS modifications into the kernel. Then use the SMIT program to configure partitions for storing AFS volumes, and replace the AIX fsck program helper with a version that correctly handles AFS volumes. If the machine is to remain an AFS client machine, incorporate AFS into the AIX secondary authentication system.

### Loading AFS into the AIX Kernel

The AIX kernel extension facility is the dynamic kernel loader provided by IBM Corporation. AIX does not support incorporation of AFS modifications during a kernel build.

For AFS to function correctly, the kernel extension facility must run each time the machine reboots, so the AFS initialization script (included in the AFS distribution) invokes it automatically. In this section you copy the script to the conventional location and edit it to select the appropriate options depending on whether NFS is also to run.

After editing the script, you run it to incorporate AFS into the kernel. In later sections you verify that the script correctly initializes all AFS components, then configure the AIX inittab file so that the script runs automatically at reboot.

1. Mount the AFS CD-ROM for AIX on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your AIX documentation. Then change directory as indicated.

          # cd  /cdrom/rs_aix42/root.client/usr/vice/etc

2. Copy the AFS kernel library files to the local /usr/vice/etc/dkload directory, and the AFS initialization script to the /etc directory.

          # cp -rp  dkload  /usr/vice/etc

          # cp -p  rc.afs  /etc/rc.afs

3. Edit the /etc/rc.afs script, setting the `NFS` variable as indicated.

   If the machine is not to function as an NFS/AFS Translator, set the `NFS` variable as follows.

          NFS=$NFS_NONE

   If the machine is to function as an NFS/AFS Translator and is running AIX 4.2.1 or higher, set the `NFS` variable as follows. Note that NFS must already be loaded into the kernel, which happens automatically on systems running AIX 4.1.1 and later, as long as the file /etc/exports exists.

          NFS=$NFS_IAUTH

4. Invoke the /etc/rc.afs script to load AFS modifications into the kernel. You can ignore any error messages about the inability to start the BOS Server or the Cache Manager or AFS client.

          # /etc/rc.afs

### Configuring Server Partitions on AIX Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

To configure server partitions on an AIX system, perform the following procedures:

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Use the SMIT program to create a journaling file system on each partition to be configured as an AFS server partition.

3. Mount each partition at one of the /vicep xx directories. Choose one of the following three methods:

   - Use the SMIT program

   - Use the mount -a command to mount all partitions at once

   - Use the mount command on each partition in turn

   Also configure the partitions so that they are mounted automatically at each reboot. For more information, refer to the AIX documentation.

### Replacing the fsck Program Helper on AIX Systems

In this section, you make modifications to guarantee that the appropriate fsck program runs on AFS server partitions. The fsck program provided with the operating system must never run on AFS server partitions. Because it does not recognize the structures that the File Server uses to organize volume data, it removes all of the data. To repeat:

Never run the standard fsck program on AFS server partitions. It discards AFS volumes.

On AIX systems, you do not replace the fsck binary itself, but rather the program helper file included in the AIX distribution as /sbin/helpers/v3fshelper.

1. Move the AIX fsck program helper to a safe location and install the version from the AFS distribution in its place. The AFS CD-ROM must still be mounted at the /cdrom directory.

          # cd /sbin/helpers

          # mv v3fshelper v3fshelper.noafs

          # cp -p /cdrom/rs_aix42/root.server/etc/v3fshelper v3fshelper

2. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login on AIX Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login on AIX Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

Follow the instructions in this section to incorporate AFS modifications into the AIX secondary authentication system.

1. Issue the ls command to verify that the afs_dynamic_auth and afs_dynamic_kerbauth programs are installed in the local /usr/vice/etc directory.

          # ls /usr/vice/etc

   If the files do not exist, mount the AFS CD-ROM for AIX (if it is not already), change directory as indicated, and copy them.

          # cd /cdrom/rs_aix42/root.client/usr/vice/etc

          # cp  -p  afs_dynamic*  /usr/vice/etc

2. Edit the local /etc/security/user file, making changes to the indicated stanzas:

   - In the default stanza, set the `registry` attribute to DCE (not to AFS), as follows:

            registry = DCE

   - In the default stanza, set the `SYSTEM` attribute as indicated.

     If the machine is an AFS client only, set the following value:

            SYSTEM = "AFS OR (AFS[UNAVAIL] AND compat[SUCCESS])"

     If the machine is both an AFS and a DCE client, set the following value (it must appear on a single line in the file):

            SYSTEM = "DCE OR DCE[UNAVAIL] OR AFS OR (AFS[UNAVAIL]  \
                AND compat[SUCCESS])"

   - In the `root` stanza, set the `registry` attribute as follows. It enables the local superuser root to log into the local file system only, based on the password listed in the local password file.

            root:
                  registry = files

3. Edit the local /etc/security/login.cfg file, creating or editing the indicated stanzas:

   - In the `DCE` stanza, set the `program` attribute as follows.

     If you use the AFS Authentication Server (kaserver process):

            DCE:
                 program = /usr/vice/etc/afs_dynamic_auth

     If you use a Kerberos implementation of AFS authentication:

            DCE:
                 program = /usr/vice/etc/afs_dynamic_kerbauth

   - In the `AFS` stanza, set the `program` attribute as follows.

     If you use the AFS Authentication Server (kaserver process):

            AFS:
                 program = /usr/vice/etc/afs_dynamic_auth

     If you use a Kerberos implementation of AFS authentication:

            AFS:
                 program = /usr/vice/etc/afs_dynamic_kerbauth

4. Proceed to Starting the BOS Server (or if referring to these instructions while installing an additional file server machine, return to Starting Server Programs).

## Getting Started on Digital UNIX Systems

Begin by either building AFS modifications into a new static kernel or by setting up to dynamically load the AFS kernel module. Then create partitions for storing AFS volumes, and replace the Digital UNIX fsck program with a version that correctly handles AFS volumes. If the machine is to remain an AFS client machine, incorporate AFS into the machine's Security Integration Architecture (SIA) matrix.

### Loading AFS into the Digital UNIX Kernel

The sysconfig program is the dynamic kernel loader provided for Digital UNIX systems.

For AFS to function correctly, the sysconfig program must run each time the machine reboots, so the AFS initialization script (included on the AFS CD-ROM) invokes it automatically. In this section you copy the appropriate AFS library file to the location where the sysconfig program accesses it and then run the script.

Mount the AFS CD-ROM for Digital UNIX on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your Digital UNIX documentation. Then change directory as indicated.

       # cd /cdrom/alpha_dux40/root.client

Copy the AFS initialization script to the local directory for initialization files (by convention, /sbin/init.d on Digital UNIX machines). Note the removal of the .rc extension as you copy the script.

       # cp usr/vice/etc/afs.rc  /sbin/init.d/afs

Copy the AFS kernel module to the local /subsys directory.

       # cp bin/afs.mod /subsys/afs.mod

Set up the system to load the module at startup.

       # /sbin/init.d/autosysconfig add afs

Reboot the machine to start using the new kernel, and login again as the superuser root.

       # cd /

       # shutdown -r now

       login: root
       Password: root_password

### Building AFS into the Digital UNIX Kernel

Use the following instructions to build AFS modifications into the kernel on a Digital UNIX system.

1. Create a copy called AFS of the basic kernel configuration file included in the Digital UNIX distribution as /usr/sys/conf/machine_name, where machine_name is the machine's hostname in all uppercase letters.

          # cd /usr/sys/conf

          # cp machine_name AFS

2. Add AFS to the list of options in the configuration file you created in the previous step, so that the result looks like the following:

                 .                   .
                 .                   .
              options               UFS
              options               NFS
              options               AFS
                 .                   .
                 .                   .

3. Add an entry for AFS to two places in the file /usr/sys/conf/files.

   - Add a line for AFS to the list of `OPTIONS`, so that the result looks like the following:

                      .                .      .
                      .                .      .
               OPTIONS/nfs          optional nfs
               OPTIONS/afs          optional afs
               OPTIONS/nfs_server   optional nfs_server
                      .                .      .
                      .                .      .

   - Add an entry for AFS to the list of `MODULES`, so that the result looks like the following:

                      .                  .        .          .
                      .                  .        .          .
               #
               MODULE/nfs_server	    optional nfs_server Binary
               nfs/nfs_server.c      module nfs_server optimize -g3
               nfs/nfs3_server.c	    module nfs_server optimize -g3
               #
               MODULE/afs            optional afs Binary
               afs/libafs.c          module afs
               #

4. Add an entry for AFS to two places in the file /usr/sys/vfs/vfs_conf.c.

   - Add AFS to the list of defined file systems, so that the result looks like the following:

                 .       .
                 .       .
              #include <afs.h>
              #if defined(AFS) && AFS
                     extern struct vfsops afs_vfsops;
              #endif
                 .       .
                 .       .

   - Put a declaration for AFS in the vfssw[] table's MOUNT_ADDON slot, so that the result looks like the following:

                 .                          .              .
                 .                          .              .
               &fdfs_vfsops,         "fdfs",   /* 12 = MOUNT_FDFS */
            #if	defined(AFS)
               &afs_vfsops,          "afs",
            #else
               (struct vfsops *)0,   "",       /* 13 = MOUNT_ADDON */
            #endif
            #if NFS && INFS_DYNAMIC
                &nfs3_vfsops,        "nfsv3",  /* 14 = MOUNT_NFS3 */

5. Mount the AFS CD-ROM for Digital UNIX on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your Digital UNIX documentation. Then change directory as indicated.

          # cd /cdrom/alpha_dux40/root.client

6. Copy the AFS initialization script to the local directory for initialization files (by convention, /sbin/init.d on Digital UNIX machines). Note the removal of the .rc extension as you copy the script.

          # cp usr/vice/etc/afs.rc  /sbin/init.d/afs

7. Copy the AFS kernel module to the local /usr/sys/BINARY directory.

   If the machine's kernel supports NFS server functionality:

          # cp bin/libafs.o /usr/sys/BINARY/afs.mod

   If the machine's kernel does not support NFS server functionality:

          # cp bin/libafs.nonfs.o /usr/sys/BINARY/afs.mod

8. Configure and build the kernel. Respond to any prompts by pressing <Return>. The resulting kernel resides in the file /sys/AFS/vmunix.

          # doconfig -c AFS

9. Rename the existing kernel file and copy the new, AFS-modified file to the standard location.

          # mv /vmunix /vmunix_noafs

          # cp /sys/AFS/vmunix /vmunix

10. Reboot the machine to start using the new kernel, and login again as the superuser root.

           # cd /

           # shutdown -r now

           login: root
           Password: root_password

### Configuring Server Partitions on Digital UNIX Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Add a line with the following format to the file systems registry file, /etc/fstab, for each directory just created. The entry maps the directory name to the disk partition to be mounted on it.

          /dev/disk /vicepxx ufs rw 0 2

   The following is an example for the first partition being configured.

          /dev/rz3a /vicepa ufs rw 0 2

3. Create a file system on each partition that is to be mounted at a /vicep xx directory. The following command is probably appropriate, but consult the Digital UNIX documentation for more information.

          # newfs -v /dev/disk

4. Mount each partition by issuing either the mount -a command to mount all partitions at once or the mount command to mount each partition in turn.

### Replacing the fsck Program on Digital UNIX Systems

In this section, you make modifications to guarantee that the appropriate fsck program runs on AFS server partitions. The fsck program provided with the operating system must never run on AFS server partitions. Because it does not recognize the structures that the File Server uses to organize volume data, it removes all of the data. To repeat:

Never run the standard fsck program on AFS server partitions. It discards AFS volumes.

On Digital UNIX systems, the files /sbin/fsck and /usr/sbin/fsck are driver programs. Rather than replacing either of them, you replace the actual binary included in the Digital UNIX distribution as /sbin/ufs_fsck and /usr/sbin/ufs_fsck.

1. Install the vfsck binary to the /sbin and /usr/sbin directories. The AFS CD-ROM must still be mounted at the /cdrom directory.

          # cd /cdrom/alpha_dux40/root.server/etc

          # cp vfsck /sbin/vfsck

          # cp vfsck /usr/sbin/vfsck

2. Rename the Digital UNIX fsck binaries and create symbolic links to the vfsck program.

          # cd /sbin

          # mv ufs_fsck ufs_fsck.noafs

          # ln -s vfsck ufs_fsck

          # cd /usr/sbin

          # mv ufs_fsck ufs_fsck.noafs

          # ln -s vfsck ufs_fsck

3. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login on Digital UNIX Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login on Digital UNIX Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

On Digital UNIX systems, the AFS initialization script automatically incorporates the AFS authentication library file into the Security Integration Architecture (SIA) matrix on the machine, so that users with AFS accounts obtain a token at login. In this section you copy the library file to the appropriate location.

For more information on SIA, see the Digital UNIX reference page for matrix.conf, or consult the section on security in your Digital UNIX documentation.

Note: | If the machine runs both the DCE and AFS client software, AFS must start after DCE. Consult the AFS initialization script for suggested symbolic links to create for correct ordering. Also, the system startup script order must initialize SIA before any long-running process that uses authentication.

Perform the following steps to enable AFS login.

1. Mount the AFS CD-ROM for Digital UNIX on the local /cdrom directory, if it is not already. Change directory as indicated.

          # cd /cdrom/alpha_dux40/lib/afs

2. Copy the appropriate AFS authentication library file to the local /usr/shlib directory.

   If you use the AFS Authentication Server (kaserver process) in the cell:

          # cp  libafssiad.so  /usr/shlib

   If you use a Kerberos implementation of AFS authentication, rename the library file as you copy it:

          # cp  libafssiad.krb.so  /usr/shlib/libafssiad.so

3. Proceed to Starting the BOS Server (or if referring to these instructions while installing an additional file server machine, return to Starting Server Programs).

## Getting Started on HP-UX Systems

Begin by building AFS modifications into a new kernel; HP-UX does not support dynamic loading. Then create partitions for storing AFS volumes, and install and configure the AFS-modified fsck program to run on AFS server partitions. If the machine is to remain an AFS client machine, incorporate AFS into the machine's Pluggable Authentication Module (PAM) scheme.

### Building AFS into the HP-UX Kernel

Use the following instructions to build AFS modifications into the kernel on an HP-UX system.

1. Move the existing kernel-related files to a safe location.

          # cp /stand/vmunix /stand/vmunix.noafs

          # cp /stand/system /stand/system.noafs

2. Mount the AFS CD-ROM for HP-UX on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your HP-UX documentation. Then change directory as indicated.

          # cd /cdrom/hp_ux110/root.client

3. Copy the AFS initialization file to the local directory for initialization files (by convention, /sbin/init.d on HP-UX machines). Note the removal of the .rc extension as you copy the file.

          # cp usr/vice/etc/afs.rc  /sbin/init.d/afs

4. Copy the file afs.driver to the local /usr/conf/master.d directory, changing its name to afs as you do.

          # cp  usr/vice/etc/afs.driver  /usr/conf/master.d/afs

5. Copy the AFS kernel module to the local /usr/conf/lib directory.

   If the machine's kernel supports NFS server functionality:

          # cp bin/libafs.a /usr/conf/lib

   If the machine's kernel does not support NFS server functionality, change the file's name as you copy it:

          # cp bin/libafs.nonfs.a /usr/conf/lib/libafs.a

6. Incorporate the AFS driver into the kernel, either using the SAM program or a series of individual commands.

   - To use the SAM program:

     1. Invoke the SAM program, specifying the hostname of the local machine as local_hostname. The SAM graphical user interface pops up.

               # sam -display local_hostname:0

     2. Choose the Kernel Configuration icon, then the Drivers icon. From the list of drivers, select afs.

     3. Open the pull-down Actions menu and choose the Add Driver to Kernel option.

     4. Open the Actions menu again and choose the Create a New Kernel option.

     5. Confirm your choices by choosing Yes and OK when prompted by subsequent pop-up windows. The SAM program builds the kernel and reboots the system.

     6. Login again as the superuser root.

               login: root
               Password: root_password

   - To use individual commands:

     1. Edit the file /stand/system, adding an entry for afs to the `Subsystems` section.

     2. Change to the /stand/build directory and issue the mk_kernel command to build the kernel.

               # cd /stand/build

               # mk_kernel

     3. Move the new kernel to the standard location (/stand/vmunix), reboot the machine to start using it, and login again as the superuser root.

               # mv /stand/build/vmunix_test /stand/vmunix

               # cd /

               # shutdown -r now

               login: root
               Password: root_password

### Configuring Server Partitions on HP-UX Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Use the SAM program to create a file system on each partition. For instructions, consult the HP-UX documentation.

3. On some HP-UX systems that use logical volumes, the SAM program automatically mounts the partitions. If it has not, mount each partition by issuing either the mount -a command to mount all partitions at once or the mount command to mount each partition in turn.

### Configuring the AFS-modified fsck Program on HP-UX Systems

In this section, you make modifications to guarantee that the appropriate fsck program runs on AFS server partitions. The fsck program provided with the operating system must never run on AFS server partitions. Because it does not recognize the structures that the File Server uses to organize volume data, it removes all of the data. To repeat:

Never run the standard fsck program on AFS server partitions. It discards AFS volumes.

On HP-UX systems, there are several configuration files to install in addition to the AFS-modified fsck program (the vfsck binary).

1. Create the command configuration file /sbin/lib/mfsconfig.d/afs. Use a text editor to place the indicated two lines in it:

          format_revision 1
          fsck            0        m,P,p,d,f,b:c:y,n,Y,N,q,

2. Create and change directory to an AFS-specific command directory called /sbin/fs/afs.

          # mkdir /sbin/fs/afs

          # cd  /sbin/fs/afs

3. Copy the AFS-modified version of the fsck program (the vfsck binary) and related files from the distribution directory to the new AFS-specific command directory.

          # cp -p /cdrom/hp_ux110/root.server/etc/*  .

4. Change the vfsck binary's name to fsck and set the mode bits appropriately on all of the files in the /sbin/fs/afs directory.

          # mv  vfsck  fsck

          # chmod  755  *

5. Edit the /etc/fstab file, changing the file system type for each AFS server partition from `hfs` to `afs`. This ensures that the AFS-modified fsck program runs on the appropriate partitions.

   The sixth line in the following example of an edited file shows an AFS server partition, /vicepa.

          /dev/vg00/lvol1 / hfs defaults 0 1
          /dev/vg00/lvol4 /opt hfs defaults 0 2
          /dev/vg00/lvol5 /tmp hfs defaults 0 2
          /dev/vg00/lvol6 /usr hfs defaults 0 2
          /dev/vg00/lvol8 /var hfs defaults 0 2
          /dev/vg00/lvol9 /vicepa afs defaults 0 2
          /dev/vg00/lvol7 /usr/vice/cache hfs defaults 0 2

6. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login on HP-UX Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login on HP-UX Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

At this point you incorporate AFS into the operating system's Pluggable Authentication Module (PAM) scheme. PAM integrates all authentication mechanisms on the machine, including login, to provide the security infrastructure for authenticated access to and from the machine.

Explaining PAM is beyond the scope of this document. It is assumed that you understand the syntax and meanings of settings in the PAM configuration file (for example, how the `other` entry works, the effect of marking an entry as `required`, `optional`, or `sufficient`, and so on).

The following instructions explain how to alter the entries in the PAM configuration file for each service for which you wish to use AFS authentication. Other configurations possibly also work, but the instructions specify the recommended and tested configuration.

Note:

The instructions specify that you mark each entry as `optional`. However, marking some modules as optional can mean that they grant access to the corresponding service even when the user does not meet all of the module's requirements. In some operating system revisions, for example, if you mark as optional the module that controls login via a dial-up connection, it allows users to login without providing a password. See the IBM AFS Release Notes for a discussion of any limitations that apply to this operating system.

Also, with some operating system versions you must install patches for PAM to interact correctly with certain authentication programs. For details, see the IBM AFS Release Notes.

The recommended AFS-related entries in the PAM configuration file make use of one or more of the following three attributes.

`try_first_pass`
  This is a standard PAM attribute that can be included on entries after the first one for a service; it directs the module to use the password that was provided to the first module. For the AFS module, it means that AFS authentication succeeds if the password provided to the module listed first is the user's correct AFS password. For further discussion of this attribute and its alternatives, see the operating system's PAM documentation.

`ignore_root`
  This attribute, specific to the AFS PAM module, directs it to ignore not only the local superuser root, but also any user with UID 0 (zero).

`setenv_password_expires`
  This attribute, specific to the AFS PAM module, sets the environment variable PASSWORD_EXPIRES to the expiration date of the user's AFS password, which is recorded in the Authentication Database.

Perform the following steps to enable AFS login.

1. Mount the AFS CD-ROM for HP-UX on the /cdrom directory, if it is not already. Then change directory as indicated.

          # cd /usr/lib/security

2. Copy the AFS authentication library file to the /usr/lib/security directory. Then create a symbolic link to it whose name does not mention the version. Omitting the version eliminates the need to edit the PAM configuration file if you later update the library file.

   If you use the AFS Authentication Server (kaserver process) in the cell:

          # cp /cdrom/hp_ux110/lib/pam_afs.so.1  .

          # ln -s  pam_afs.so.1  pam_afs.so

   If you use a Kerberos implementation of AFS authentication:

          # cp /cdrom/hp_ux110/lib/pam_afs.krb.so.1   .

          # ln -s pam_afs.krb.so.1 pam_afs.so

3. Edit the `Authentication management` section of the HP-UX PAM configuration file, /etc/pam.conf by convention. The entries in this section have the value `auth` in their second field.

   First edit the standard entries, which refer to the HP-UX PAM module (usually, the file /usr/lib/security/libpam_unix.1) in their fourth field. For each service for which you want to use AFS authentication, edit the third field of its entry to read `optional`. The pam.conf file in the HP-UX distribution usually includes standard entries for the login and ftp services, for instance.

   If there are services for which you want to use AFS authentication, but for which the pam.conf file does not already include a standard entry, you must create that entry and place the value `optional` in its third field. For instance, the HP-UX pam.conf file does not usually include standard entries for the remsh or telnet services.

   Then create an AFS-related entry for each service, placing it immediately below the standard entry. The following example shows what the `Authentication Management` section looks like after you have you edited or created entries for the services mentioned previously. Note that the example AFS entries appear on two lines only for legibility.

          login   auth  optional  /usr/lib/security/libpam_unix.1
          login   auth  optional  /usr/lib/security/pam_afs.so      \
                try_first_pass  ignore_root  setenv_password_expires
          ftp     auth  optional  /usr/lib/security/libpam_unix.1
          ftp     auth  optional  /usr/lib/security/pam_afs.so      \
                try_first_pass  ignore_root
          remsh   auth  optional  /usr/lib/security/libpam_unix.1
          remsh   auth  optional  /usr/lib/security/pam_afs.so      \
                try_first_pass  ignore_root
          telnet  auth  optional  /usr/lib/security/libpam_unix.1
          telnet  auth  optional  /usr/lib/security/pam_afs.so      \
                try_first_pass  ignore_root  setenv_password_expires

4. If you use the Common Desktop Environment (CDE) on the machine and want users to obtain an AFS token as they log in, also add or edit the following four entries in the `Authentication management` section. Note that the AFS-related entries appear on two lines here only for legibility.

          dtlogin   auth  optional  /usr/lib/security/libpam_unix.1
          dtlogin   auth  optional  /usr/lib/security/pam_afs.so     \
                try_first_pass  ignore_root
          dtaction  auth  optional  /usr/lib/security/libpam_unix.1
          dtaction  auth  optional  /usr/lib/security/pam_afs.so     \
                try_first_pass  ignore_root

5. Proceed to Starting the BOS Server (or if referring to these instructions while installing an additional file server machine, return to Starting Server Programs).

## Getting Started on IRIX Systems

To incorporate AFS into the kernel on IRIX systems, choose one of two methods:

- Run the AFS initialization script to invoke the ml program distributed by Silicon Graphics, Incorporated (SGI), which dynamically loads AFS modifications into the kernel

- Build a new static kernel

Then create partitions for storing AFS volumes. You do not need to replace the IRIX fsck program because SGI has already modified it to handle AFS volumes properly. If the machine is to remain an AFS client machine, verify that the IRIX login utility installed on the machine grants an AFS token.

In preparation for either dynamic loading or kernel building, perform the following procedures:

1. Mount the AFS CD-ROM for IRIX on the /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your IRIX documentation. Then change directory as indicated.

          # cd  /cdrom/sgi_65/root.client

2. Copy the AFS initialization script to the local directory for initialization files (by convention, /etc/init.d on IRIX machines). Note the removal of the .rc extension as you copy the script.

          # cp -p   usr/vice/etc/afs.rc  /etc/init.d/afs

3. Issue the uname -m command to determine the machine's CPU board type. The IP xx value in the output must match one of the supported CPU board types listed in the IBM AFS Release Notes for the current version of AFS.

          # uname -m

4. Proceed to either Loading AFS into the IRIX Kernel or Building AFS into the IRIX Kernel.

### Loading AFS into the IRIX Kernel

The ml program is the dynamic kernel loader provided by SGI for IRIX systems. If you use it rather than building AFS modifications into a static kernel, then for AFS to function correctly the ml program must run each time the machine reboots. Therefore, the AFS initialization script (included on the AFS CD-ROM) invokes it automatically when the afsml configuration variable is activated. In this section you activate the variable and run the script.

In later sections you verify that the script correctly initializes all AFS components, then create the links that incorporate AFS into the IRIX startup and shutdown sequence.

1. Create the local /usr/vice/etc/sgiload directory to house the AFS kernel library file.

          # mkdir /usr/vice/etc/sgiload

2. Copy the appropriate AFS kernel library file to the /usr/vice/etc/sgiload directory. The IP xx portion of the library file name must match the value previously returned by the uname -m command. Also choose the file appropriate to whether the machine's kernel supports NFS server functionality (NFS must be supported for the machine to act as an NFS/AFS Translator). Single- and multiprocessor machines use the same library file.

   (You can choose to copy all of the kernel library files into the /usr/vice/etc/sgiload directory, but they require a significant amount of space.)

   If the machine's kernel supports NFS server functionality:

          # cp -p  usr/vice/etc/sgiload/libafs.IPxx.o  /usr/vice/etc/sgiload

   If the machine's kernel does not support NFS server functionality:

          # cp -p  usr/vice/etc/sgiload/libafs.IPxx.nonfs.o   \
                          /usr/vice/etc/sgiload

3. Issue the chkconfig command to activate the afsml configuration variable.

          # /etc/chkconfig -f afsml on

   If the machine is to function as an NFS/AFS Translator and the kernel supports NFS server functionality, activate the afsxnfs variable.

          # /etc/chkconfig -f afsxnfs on

4. Run the /etc/init.d/afs script to load AFS extensions into the kernel. The script invokes the ml command, automatically determining which kernel library file to use based on this machine's CPU type and the activation state of the afsxnfs variable.

   You can ignore any error messages about the inability to start the BOS Server or the Cache Manager or AFS client.

          # /etc/init.d/afs start

5. Proceed to Configuring Server Partitions on IRIX Systems.

### Building AFS into the IRIX Kernel

Use the following instructions to build AFS modifications into the kernel on an IRIX system.

1. Copy the kernel initialization file afs.sm to the local /var/sysgen/system directory, and the kernel master file afs to the local /var/sysgen/master.d directory.

          # cp -p  bin/afs.sm  /var/sysgen/system

          # cp -p  bin/afs  /var/sysgen/master.d

2. Copy the appropriate AFS kernel library file to the local file /var/sysgen/boot/afs.a; the IP xx portion of the library file name must match the value previously returned by the uname -m command. Also choose the file appropriate to whether the machine's kernel supports NFS server functionality (NFS must be supported for the machine to act as an NFS/AFS Translator). Single- and multiprocessor machines use the same library file.

   If the machine's kernel supports NFS server functionality:

          # cp -p   bin/libafs.IPxx.a   /var/sysgen/boot/afs.a

   If the machine's kernel does not support NFS server functionality:

          # cp -p  bin/libafs.IPxx.nonfs.a  /var/sysgen/boot/afs.a

3. Issue the chkconfig command to deactivate the afsml configuration variable.

          # /etc/chkconfig -f afsml off

   If the machine is to function as an NFS/AFS Translator and the kernel supports NFS server functionality, activate the afsxnfs variable.

          # /etc/chkconfig -f afsxnfs on

4. Copy the existing kernel file, /unix, to a safe location. Compile the new kernel, which is created in the file /unix.install. It overwrites the existing /unix file when the machine reboots in the next step.

          # cp /unix /unix_noafs

          # autoconfig

5. Reboot the machine to start using the new kernel, and login again as the superuser root.

          # cd /

          # shutdown -i6 -g0 -y

          login: root
          Password: root_password

### Configuring Server Partitions on IRIX Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

AFS supports use of both EFS and XFS partitions for housing AFS volumes. SGI encourages use of XFS partitions.

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Add a line with the following format to the file systems registry file, /etc/fstab, for each partition (or logical volume created with the XLV volume manager) to be mounted on one of the directories created in the previous step.

   For an XFS partition or logical volume:

          /dev/dsk/disk  /vicepxx  xfs  rw,raw=/dev/rdsk/disk  0  0

   For an EFS partition:

          /dev/dsk/disk  /vicepxx  efs  rw,raw=/dev/rdsk/disk  0  0

   The following are examples of an entry for each file system type:

          /dev/dsk/dks0d2s6 /vicepa  xfs rw,raw=/dev/rdsk/dks0d2s6  0 0
          /dev/dsk/dks0d3s1 /vicepb  efs rw,raw=/dev/rdsk/dks0d3s1  0 0

3. Create a file system on each partition that is to be mounted on a /vicep xx directory. The following commands are probably appropriate, but consult the IRIX documentation for more information. In both cases, raw_device is a raw device name like /dev/rdsk/dks0d0s0 for a single disk partition or /dev/rxlv/xlv0 for a logical volume.

   For XFS file systems, include the indicated options to configure the partition or logical volume with inodes large enough to accommodate AFS-specific information:

          # mkfs -t xfs -i size=512 -l size=4000b raw_device

   For EFS file systems:

          # mkfs -t efs raw_device

4. Mount each partition by issuing either the mount -a command to mount all partitions at once or the mount command to mount each partition in turn.

5. (Optional) If you have configured partitions or logical volumes to use XFS, issue the following command to verify that the inodes are configured properly (are large enough to accommodate AFS-specific information). If the configuration is correct, the command returns no output. Otherwise, it specifies the command to run in order to configure each partition or logical volume properly.

          # /usr/afs/bin/xfs_size_check

6. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login on IRIX Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login on IRIX Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

The standard IRIX command-line login program and the graphical xdm login program both automatically grant an AFS token when AFS is incorporated into the machine's kernel. However, some IRIX distributions use another login utility by default, and it does not necessarily incorporate the required AFS modifications. If that is the case, you must disable the default utility if you want AFS users to obtain AFS tokens at login. For further discussion, see the IBM AFS Release Notes.

If you configure the machine to use an AFS-modified login utility, then the afsauthlib.so and afskauthlib.so files (included in the AFS distribution) must reside in the /usr/vice/etc directory. Issue the ls command to verify.

       # ls /usr/vice/etc

If the files do not exist, mount the AFS CD-ROM for IRIX (if it is not already), change directory as indicated, and copy them.

       # cd /cdrom/sgi_65/root.client/usr/vice/etc

       # cp  -p  *authlib*  /usr/vice/etc

After taking any necessary action, proceed to Starting the BOS Server.

## Getting Started on Linux Systems

Begin by running the AFS initialization script to call the insmod program, which dynamically loads AFS modifications into the kernel. Then create partitions for storing AFS volumes. You do not need to replace the Linux fsck program. If the machine is to remain an AFS client machine, incorporate AFS into the machine's Pluggable Authentication Module (PAM) scheme.

### Loading AFS into the Linux Kernel

The insmod program is the dynamic kernel loader for Linux. Linux does not support incorporation of AFS modifications during a kernel build.

For AFS to function correctly, the insmod program must run each time the machine reboots, so the AFS initialization script (included on the AFS CD-ROM) invokes it automatically. The script also includes commands that select the appropriate AFS library file automatically. In this section you run the script.

In later sections you verify that the script correctly initializes all AFS components, then activate a configuration variable, which results in the script being incorporated into the Linux startup and shutdown sequence.

1. Mount the AFS CD-ROM for Linux on the local /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your Linux documentation. Then change directory as indicated.

          # cd  /cdrom/i386_linux22/root.client/usr/vice/etc

2. Copy the AFS kernel library files to the local /usr/vice/etc/modload directory. The filenames for the libraries have the format libafs-version.o, where version indicates the kernel build level. The string .mp in the version indicates that the file is appropriate for machines running a multiprocessor kernel.

          # cp -rp  modload  /usr/vice/etc

3. Copy the AFS initialization script to the local directory for initialization files (by convention, /etc/rc.d/init.d on Linux machines). Note the removal of the .rc extension as you copy the script.

          # cp -p   afs.rc  /etc/rc.d/init.d/afs

4. Run the AFS initialization script to load AFS extensions into the kernel. You can ignore any error messages about the inability to start the BOS Server or the Cache Manager or AFS client.

          # /etc/rc.d/init.d/afs  start

### Configuring Server Partitions on Linux Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Add a line with the following format to the file systems registry file, /etc/fstab, for each directory just created. The entry maps the directory name to the disk partition to be mounted on it.

          /dev/disk  /vicepxx  ext2  defaults  0  2

   The following is an example for the first partition being configured.

          /dev/sda8 /vicepa ext2 defaults 0 2

3. Create a file system on each partition that is to be mounted at a /vicep xx directory. The following command is probably appropriate, but consult the Linux documentation for more information.

          # mkfs -v /dev/disk

4. Mount each partition by issuing either the mount -a command to mount all partitions at once or the mount command to mount each partition in turn.

5. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login on Linux Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login on Linux Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

At this point you incorporate AFS into the operating system's Pluggable Authentication Module (PAM) scheme. PAM integrates all authentication mechanisms on the machine, including login, to provide the security infrastructure for authenticated access to and from the machine.

Explaining PAM is beyond the scope of this document. It is assumed that you understand the syntax and meanings of settings in the PAM configuration file (for example, how the `other` entry works, the effect of marking an entry as `required`, `optional`, or `sufficient`, and so on).

The following instructions explain how to alter the entries in the PAM configuration file for each service for which you wish to use AFS authentication. Other configurations possibly also work, but the instructions specify the recommended and tested configuration.

The recommended AFS-related entries in the PAM configuration file make use of one or more of the following three attributes.

`try_first_pass`
  This is a standard PAM attribute that can be included on entries after the first one for a service; it directs the module to use the password that was provided to the first module. For the AFS module, it means that AFS authentication succeeds if the password provided to the module listed first is the user's correct AFS password. For further discussion of this attribute and its alternatives, see the operating system's PAM documentation.

`ignore_root`
  This attribute, specific to the AFS PAM module, directs it to ignore not only the local superuser root, but also any user with UID 0 (zero).

`setenv_password_expires`
  This attribute, specific to the AFS PAM module, sets the environment variable PASSWORD_EXPIRES to the expiration date of the user's AFS password, which is recorded in the Authentication Database.

Perform the following steps to enable AFS login.

1. Mount the AFS CD-ROM for Linux on the /cdrom directory, if it is not already. Then change to the directory for PAM modules, which depends on which Linux distribution you are using.

   If you are using a Linux distribution from Red Hat Software:

          # cd /lib/security

   If you are using another Linux distribution:

          # cd /usr/lib/security

2. Copy the appropriate AFS authentication library file to the directory to which you changed in the previous step. Create a symbolic link whose name does not mention the version. Omitting the version eliminates the need to edit the PAM configuration file if you later update the library file.

   If you use the AFS Authentication Server (kaserver process):

          # cp /cdrom/i386_linux22/lib/pam_afs.so.1  .

          # ln -s pam_afs.so.1 pam_afs.so

   If you use a Kerberos implementation of AFS authentication:

          # cp /cdrom/i386_linux22/lib/pam_afs.krb.so.1   .

          # ln -s pam_afs.krb.so.1 pam_afs.so

3. For each service with which you want to use AFS authentication, insert an entry for the AFS PAM module into the `auth` section of the service's PAM configuration file. (Linux uses a separate configuration file for each service, unlike some other operating systems which list all services in a single file.) Mark the entry as `sufficient` in the second field.

   Place the AFS entry below any entries that impose conditions under which you want the service to fail for a user who does not meet the entry's requirements. Mark these entries `required`. Place the AFS entry above any entries that need to execute only if AFS authentication fails.

   Insert the following AFS entry if using the Red Hat distribution:

          auth  sufficient  /lib/security/pam_afs.so   try_first_pass  ignore_root

   Insert the following AFS entry if using another distribution:

          auth  sufficient  /usr/lib/security/pam_afs.so  try_first_pass  ignore_root

   The following example illustrates the recommended configuration of the configuration file for the login service (/etc/pam.d/login) on a machine using the Red Hat distribution.

          #%PAM-1.0
          auth      required   /lib/security/pam_securetty.so
          auth      required   /lib/security/pam_nologin.so
          auth      sufficient /lib/security/pam_afs.so try_first_pass ignore_root
          auth      required   /lib/security/pam_pwdb.so shadow nullok
          account   required   /lib/security/pam_pwdb.so
          password  required   /lib/security/pam_cracklib.so
          password  required   /lib/security/pam_pwdb.so shadow nullok use_authtok
          session   required   /lib/security/pam_pwdb.so

4. Proceed to Starting the BOS Server (or if referring to these instructions while installing an additional file server machine, return to Starting Server Programs).

## Getting Started on Solaris Systems

Begin by running the AFS initialization script to call the modload program distributed by Sun Microsystems, which dynamically loads AFS modifications into the kernel. Then create partitions for storing AFS volumes, and install and configure the AFS-modified fsck program to run on AFS server partitions. If the machine is to remain an AFS client machine, incorporate AFS into the machine's Pluggable Authentication Module (PAM) scheme.

### Loading AFS into the Solaris Kernel

The modload program is the dynamic kernel loader provided by Sun Microsystems for Solaris systems. Solaris does not support incorporation of AFS modifications during a kernel build.

For AFS to function correctly, the modload program must run each time the machine reboots, so the AFS initialization script (included on the AFS CD-ROM) invokes it automatically. In this section you copy the appropriate AFS library file to the location where the modload program accesses it and then run the script.

In later sections you verify that the script correctly initializes all AFS components, then create the links that incorporate AFS into the Solaris startup and shutdown sequence.

1. Mount the AFS CD-ROM for Solaris on the /cdrom directory. For instructions on mounting CD-ROMs (either locally or remotely via NFS), see your Solaris documentation. Then change directory as indicated.

          # cd  /cdrom/sun4x_56/root.client/usr/vice/etc

2. Copy the AFS initialization script to the local directory for initialization files (by convention, /etc/init.d on Solaris machines). Note the removal of the .rc extension as you copy the script.

          # cp -p  afs.rc  /etc/init.d/afs

3. Copy the appropriate AFS kernel library file to the local file /kernel/fs/afs.

   If the machine is running Solaris 2.6 or the 32-bit version of Solaris 7, its kernel supports NFS server functionality, and the nfsd process is running:

          # cp -p modload/libafs.o /kernel/fs/afs

   If the machine is running Solaris 2.6 or the 32-bit version of Solaris 7, and its kernel does not support NFS server functionality or the nfsd process is not running:

          # cp -p modload/libafs.nonfs.o /kernel/fs/afs

   If the machine is running the 64-bit version of Solaris 7, its kernel supports NFS server functionality, and the nfsd process is running:

          # cp -p modload/libafs64.o /kernel/fs/sparcv9/afs

   If the machine is running the 64-bit version of Solaris 7, and its kernel does not support NFS server functionality or the nfsd process is not running:

          # cp -p modload/libafs64.nonfs.o /kernel/fs/sparcv9/afs

4. Run the AFS initialization script to load AFS modifications into the kernel. You can ignore any error messages about the inability to start the BOS Server or the Cache Manager or AFS client.

          # /etc/init.d/afs start

   When an entry called `afs` does not already exist in the local /etc/name_to_sysnum file, the script automatically creates it and reboots the machine to start using the new version of the file. If this happens, log in again as the superuser root after the reboot and run the initialization script again. This time the required entry exists in the /etc/name_to_sysnum file, and the modload program runs.

          login: root
          Password: root_password

          # /etc/init.d/afs start

### Configuring the AFS-modified fsck Program on Solaris Systems

In this section, you make modifications to guarantee that the appropriate fsck program runs on AFS server partitions. The fsck program provided with the operating system must never run on AFS server partitions. Because it does not recognize the structures that the File Server uses to organize volume data, it removes all of the data. To repeat:

Never run the standard fsck program on AFS server partitions. It discards AFS volumes.

1. Create the /usr/lib/fs/afs directory to house the AFS-modified fsck program and related files.

          # mkdir /usr/lib/fs/afs

          # cd /usr/lib/fs/afs

2. Copy the vfsck binary to the newly created directory, changing the name as you do so.

          # cp  /cdrom/sun4x_56/root.server/etc/vfsck  fsck

3. Working in the /usr/lib/fs/afs directory, create the following links to Solaris libraries:

          # ln -s /usr/lib/fs/ufs/clri
          # ln -s /usr/lib/fs/ufs/df
          # ln -s /usr/lib/fs/ufs/edquota
          # ln -s /usr/lib/fs/ufs/ff
          # ln -s /usr/lib/fs/ufs/fsdb
          # ln -s /usr/lib/fs/ufs/fsirand
          # ln -s /usr/lib/fs/ufs/fstyp
          # ln -s /usr/lib/fs/ufs/labelit
          # ln -s /usr/lib/fs/ufs/lockfs
          # ln -s /usr/lib/fs/ufs/mkfs
          # ln -s /usr/lib/fs/ufs/mount
          # ln -s /usr/lib/fs/ufs/ncheck
          # ln -s /usr/lib/fs/ufs/newfs
          # ln -s /usr/lib/fs/ufs/quot
          # ln -s /usr/lib/fs/ufs/quota
          # ln -s /usr/lib/fs/ufs/quotaoff
          # ln -s /usr/lib/fs/ufs/quotaon
          # ln -s /usr/lib/fs/ufs/repquota
          # ln -s /usr/lib/fs/ufs/tunefs
          # ln -s /usr/lib/fs/ufs/ufsdump
          # ln -s /usr/lib/fs/ufs/ufsrestore
          # ln -s /usr/lib/fs/ufs/volcopy

4. Append the following line to the end of the file /etc/dfs/fstypes.

          afs AFS Utilities

5. Edit the /sbin/mountall file, making two changes.

   - Add an entry for AFS to the `case` statement for option 2, so that it reads as follows:

            case "$2" in
            ufs)    foptions="-o p"
                    ;;
            afs)    foptions="-o p"
                    ;;
            s5)     foptions="-y -t /var/tmp/tmp$$ -D"
                    ;;
            *)      foptions="-y"
                    ;;

   - Edit the file so that all AFS and UFS partitions are checked in parallel. Replace the following section of code:

            # For  fsck purposes, we make a distinction between ufs and
            # other file systems
            #
            if [ "$fstype" = "ufs" ]; then
                 ufs_fscklist="$ufs_fscklist $fsckdev"
                 saveentry $fstype "$OPTIONS" $special $mountp
                 continue
            fi

     with the following section of code:

            # For fsck purposes, we make a distinction between ufs/afs
            # and other file systems.
            #
            if [ "$fstype" = "ufs" -o "$fstype" = "afs" ]; then
                 ufs_fscklist="$ufs_fscklist $fsckdev"
                 saveentry $fstype "$OPTIONS" $special $mountp
                 continue
            fi

### Configuring Server Partitions on Solaris Systems

Every AFS file server machine must have at least one partition or logical volume dedicated to storing AFS volumes. Each server partition is mounted at a directory named /vicep xx, where xx is one or two lowercase letters. The /vicep xx directories must reside in the file server machine's root directory, not in one of its subdirectories (for example, /usr/vicepa is not an acceptable directory location). For additional information, see Performing Platform-Specific Procedures.

1. Create a directory called /vicep xx for each AFS server partition you are configuring (there must be at least one). Repeat the command for each partition.

          # mkdir /vicepxx

2. Add a line with the following format to the file systems registry file, /etc/vfstab, for each partition to be mounted on a directory created in the previous step. Note the value `afs` in the fourth field, which tells Solaris to use the AFS-modified fsck program on this partition.

          /dev/dsk/disk   /dev/rdsk/disk   /vicepxx   afs   boot_order  yes

   The following is an example for the first partition being configured.

          /dev/dsk/c0t6d0s1 /dev/rdsk/c0t6d0s1 /vicepa afs 3 yes

3. Create a file system on each partition that is to be mounted at a /vicep xx directory. The following command is probably appropriate, but consult the Solaris documentation for more information.

          # newfs -v /dev/rdsk/disk

4. Issue the mountall command to mount all partitions at once.

5. If you plan to retain client functionality on this machine after completing the installation, proceed to Enabling AFS Login and Editing the File Systems Clean-up Script on Solaris Systems. Otherwise, proceed to Starting the BOS Server.

### Enabling AFS Login and Editing the File Systems Clean-up Script on Solaris Systems

Note: | If you plan to remove client functionality from this machine after completing the installation, skip this section and proceed to Starting the BOS Server.

At this point you incorporate AFS into the operating system's Pluggable Authentication Module (PAM) scheme. PAM integrates all authentication mechanisms on the machine, including login, to provide the security infrastructure for authenticated access to and from the machine.

Explaining PAM is beyond the scope of this document. It is assumed that you understand the syntax and meanings of settings in the PAM configuration file (for example, how the `other` entry works, the effect of marking an entry as `required`, `optional`, or `sufficient`, and so on).

The following instructions explain how to alter the entries in the PAM configuration file for each service for which you wish to use AFS authentication. Other configurations possibly also work, but the instructions specify the recommended and tested configuration.

Note:

The instructions specify that you mark each entry as `optional`. However, marking some modules as optional can mean that they grant access to the corresponding service even when the user does not meet all of the module's requirements. In some operating system revisions, for example, if you mark as optional the module that controls login via a dial-up connection, it allows users to login without providing a password. See the IBM AFS Release Notes for a discussion of any limitations that apply to this operating system.

Also, with some operating system versions you must install patches for PAM to interact correctly with certain authentication programs. For details, see the IBM AFS Release Notes.

The recommended AFS-related entries in the PAM configuration file make use of one or more of the following three attributes.

`try_first_pass`
  This is a standard PAM attribute that can be included on entries after the first one for a service; it directs the module to use the password that was provided to the first module. For the AFS module, it means that AFS authentication succeeds if the password provided to the module listed first is the user's correct AFS password. For further discussion of this attribute and its alternatives, see the operating system's PAM documentation.

`ignore_root`
  This attribute, specific to the AFS PAM module, directs it to ignore not only the local superuser root, but also any user with UID 0 (zero).

`setenv_password_expires`
  This attribute, specific to the AFS PAM module, sets the environment variable PASSWORD_EXPIRES to the expiration date of the user's AFS password, which is recorded in the Authentication Database.

Perform the following steps to enable AFS login.

1. Mount the AFS CD-ROM for Solaris on the /cdrom directory, if it is not already. Then change directory as indicated.

          # cd /usr/lib/security

2. Copy the AFS authentication library file to the /usr/lib/security directory. Then create a symbolic link to it whose name does not mention the version. Omitting the version eliminates the need to edit the PAM configuration file if you later update the library file.

   If you use the AFS Authentication Server (kaserver process):

          # cp /cdrom/sun4x_56/lib/pam_afs.so.1 .

          # ln -s pam_afs.so.1 pam_afs.so

   If you use a Kerberos implementation of AFS authentication:

          # cp /cdrom/sun4x_56/lib/pam_afs.krb.so.1 .

          # ln -s pam_afs.krb.so.1 pam_afs.so

3. Edit the `Authentication management` section of the Solaris PAM configuration file, /etc/pam.conf by convention. The entries in this section have the value `auth` in their second field.

   First edit the standard entries, which refer to the Solaris PAM module (usually, the file /usr/lib/security/pam_unix.so.1) in their fourth field. For each service for which you want to use AFS authentication, edit the third field of its entry to read `optional`. The pam.conf file in the Solaris distribution usually includes standard entries for the login, rlogin, and rsh services, for instance.

   If there are services for which you want to use AFS authentication, but for which the pam.conf file does not already include a standard entry, you must create that entry and place the value `optional` in its third field. For instance, the Solaris pam.conf file does not usually include standard entries for the ftp or telnet services.

   Then create an AFS-related entry for each service, placing it immediately below the standard entry. The following example shows what the `Authentication Management` section looks like after you have you edited or created entries for the services mentioned previously. Note that the example AFS entries appear on two lines only for legibility.

          login   auth  optional  /usr/lib/security/pam_unix.so.1
          login   auth  optional  /usr/lib/security/pam_afs.so       \
                try_first_pass  ignore_root  setenv_password_expires
          rlogin  auth  optional  /usr/lib/security/pam_unix.so.1
          rlogin  auth  optional  /usr/lib/security/pam_afs.so       \
                try_first_pass  ignore_root  setenv_password_expires
          rsh     auth  optional  /usr/lib/security/pam_unix.so.1
          rsh     auth  optional  /usr/lib/security/pam_afs.so       \
                try_first_pass  ignore_root
          ftp     auth  optional  /usr/lib/security/pam_unix.so.1
          ftp     auth  optional  /usr/lib/security/pam_afs.so       \
                try_first_pass  ignore_root
          telnet  auth  optional  /usr/lib/security/pam_unix.so.1
          telnet  auth  optional  /usr/lib/security/pam_afs.so       \
                try_first_pass  ignore_root  setenv_password_expires

4. If you use the Common Desktop Environment (CDE) on the machine and want users to obtain an AFS token as they log in, also add or edit the following four entries in the `Authentication management` section. Note that the AFS-related entries appear on two lines here only for legibility.

          dtlogin   auth  optional  /usr/lib/security/pam_unix.so.1
          dtlogin   auth  optional  /usr/lib/security/pam_afs.so     \
                try_first_pass  ignore_root
          dtsession  auth  optional /usr/lib/security/pam_unix.so.1
          dtsession  auth  optional /usr/lib/security/pam_afs.so     \
                try_first_pass  ignore_root

5. Some Solaris distributions include a script that locates and removes unneeded files from various file systems. Its conventional location is /usr/lib/fs/nfs/nfsfind. The script generally uses an argument to the find command to define which file systems to search. In this step you modify the command to exclude the /afs directory. Otherwise, the command traverses the AFS filespace of every cell that is accessible from the machine, which can take many hours. The following alterations are possibilities, but you must verify that they are appropriate for your cell.

   The first possible alteration is to add the -local flag to the existing command, so that it looks like the following:

          find $dir -local -name .nfs\* -mtime +7 -mount -exec rm -f {} \;

   Another alternative is to exclude any directories whose names begin with the lowercase letter a or a non-alphabetic character.

          find /[A-Zb-z]*  remainder of existing command

   Do not use the following command, which still searches under the /afs directory, looking for a subdirectory of type 4.2.

          find / -fstype 4.2     /* do not use */

6. Proceed to Starting the BOS Server (or if referring to these instructions while installing an additional file server machine, return to Starting Server Programs).

## Starting the BOS Server

You are now ready to start the AFS server processes on this machine. Begin by copying the AFS server binaries from the CD-ROM to the conventional local disk location, the /usr/afs/bin directory. The following instructions also create files in other subdirectories of the /usr/afs directory.

Then issue the bosserver command to initialize the Basic OverSeer (BOS) Server, which monitors and controls other AFS server processes on its server machine. Include the -noauth flag to disable authorization checking. Because you have not yet configured your cell's AFS authentication and authorization mechanisms, the BOS Server cannot perform authorization checking as it does during normal operation. In no-authorization mode, it does not verify the identity or privilege of the issuer of a bos command, and so performs any operation for anyone.

Disabling authorization checking gravely compromises cell security. You must complete all subsequent steps in one uninterrupted pass and must not leave the machine unattended until you restart the BOS Server with authorization checking enabled, in Verifying the AFS Initialization Script.

As it initializes for the first time, the BOS Server creates the following directories and files, setting the owner to the local superuser root and the mode bits to limit the ability to write (and in some cases, read) them. For a description of the contents and function of these directories and files, see the chapter in the IBM AFS Administration Guide about administering server machines. For further discussion of the mode bit settings, see Protecting Sensitive AFS Directories.

- /usr/afs/db

- /usr/afs/etc/CellServDB

- /usr/afs/etc/ThisCell

- /usr/afs/local

- /usr/afs/logs

The BOS Server also creates symbolic links called /usr/vice/etc/ThisCell and /usr/vice/etc/CellServDB to the corresponding files in the /usr/afs/etc directory. The AFS command interpreters consult the CellServDB and ThisCell files in the /usr/vice/etc directory because they generally run on client machines. On machines that are AFS servers only (as this machine currently is), the files reside only in the /usr/afs/etc directory; the links enable the command interpreters to retrieve the information they need. Later instructions for installing the client functionality replace the links with actual files.

1. On the local /cdrom directory, mount the AFS CD-ROM for this machine's system type, if it is not already. For instructions on mounting CD-ROMs (either locally or remotely via NFS), consult the operating system documentation.

2. Copy files from the CD-ROM to the local /usr/afs directory.

          # cd /cdrom/sysname/root.server/usr/afs

          # cp -rp  *  /usr/afs

3. Issue the bosserver command. Include the -noauth flag to disable authorization checking.

          # /usr/afs/bin/bosserver -noauth &

4. Verify that the BOS Server created /usr/vice/etc/ThisCell and /usr/vice/etc/CellServDB as symbolic links to the corresponding files in the /usr/afs/etc directory.

          # ls -l  /usr/vice/etc

   If either or both of /usr/vice/etc/ThisCell and /usr/vice/etc/CellServDB do not exist, or are not links, issue the following commands.

          # cd /usr/vice/etc

          # ln -s /usr/afs/etc/ThisCell

          # ln -s /usr/afs/etc/CellServDB

## Defining Cell Name and Membership for Server Processes

Now assign your cell's name. The chapter in the IBM AFS Administration Guide about cell configuration and administration issues discusses the important considerations, explains why changing the name is difficult, and outlines the restrictions on name format. Two of the most important restrictions are that the name cannot include uppercase letters or more than 64 characters.

Use the bos setcellname command to assign the cell name. It creates two files:

- /usr/afs/etc/ThisCell, which defines this machine's cell membership

- /usr/afs/etc/CellServDB, which lists the cell's database server machines; the machine named on the command line is placed on the list automatically

Note: | In the following and every instruction in this guide, for the machine name argument substitute the fully-qualified hostname (such as fs1.abc.com) of the machine you are installing. For the cell name argument substitute your cell's complete name (such as abc.com).

1. Issue the bos setcellname command to set the cell name.

          # cd /usr/afs/bin

          # ./bos setcellname <machine name> <cell name> -noauth

   Because you are not authenticated and authorization checking is disabled, the bos command interpreter possibly produces error messages about being unable to obtain tickets and running unauthenticated. You can safely ignore the messages.

2. Issue the bos listhosts command to verify that the machine you are installing is now registered as the cell's first database server machine.

          # ./bos listhosts <machine name> -noauth
          Cell name is cell_name
              Host 1 is machine_name

## Starting the Database Server Processes

Next use the bos create command to create entries for the four database server processes in the /usr/afs/local/BosConfig file and start them running. The four processes run on database server machines only:

- The Authentication Server (the kaserver process) maintains the Authentication Database

- The Backup Server (the buserver process) maintains the Backup Database

- The Protection Server (the ptserver process) maintains the Protection Database

- The Volume Location (VL) Server (the vlserver process) maintains the Volume Location Database (VLDB)

Note:

AFS's authentication and authorization software is based on algorithms and other procedures known as Kerberos, as originally developed by Project Athena at the Massachusetts Institute of Technology. Some cells choose to replace the AFS Authentication Server and other security-related protocols with Kerberos as obtained directly from Project Athena or other sources. If you wish to do this, contact the AFS Product Support group now to learn about necessary modifications to the installation.

The remaining instructions in this chapter include the -cell argument on all applicable commands. Provide the cell name you assigned in Defining Cell Name and Membership for Server Processes. If a command appears on multiple lines, it is only for legibility.

1. Issue the bos create command to start the Authentication Server. The current working directory is still /usr/afs/bin.

          # ./bos create <machine name> kaserver simple /usr/afs/bin/kaserver  \
                         -cell <cell name>  -noauth

   You can safely ignore the messages that tell you to add Kerberos to the /etc/services file; AFS uses a default value that makes the addition unnecessary. You can also ignore messages about the failure of authentication.

2. Issue the bos create command to start the Backup Server.

          # ./bos create <machine name> buserver simple /usr/afs/bin/buserver  \
                         -cell <cell name>  -noauth

3. Issue the bos create command to start the Protection Server.

          # ./bos create <machine name> ptserver simple /usr/afs/bin/ptserver  \
                         -cell <cell name>  -noauth

4. Issue the bos create command to start the VL Server.

          # ./bos create <machine name> vlserver simple /usr/afs/bin/vlserver  \
                         -cell <cell name>  -noauth

## Initializing Cell Security

Now initialize the cell's security mechanisms. Begin by creating the following two initial entries in the Authentication Database:

- A generic administrative account, called admin by convention. If you choose to assign a different name, substitute it throughout the remainder of this document.

  After you complete the installation of the first machine, you can continue to have all administrators use the admin account, or you can create a separate administrative account for each of them. The latter scheme implies somewhat more overhead, but provides a more informative audit trail for administrative operations.

- The entry for AFS server processes, called afs. No user logs in under this identity, but the Authentication Server's Ticket Granting Service (TGS) module uses the associated key to encrypt the server tickets that it grants to AFS clients for presentation to server processes during mutual authentication. (The chapter in the IBM AFS Administration Guide about cell configuration and administration describes the role of server encryption keys in mutual authentication.)

  In Step 7, you also place the initial AFS server encryption key into the /usr/afs/etc/KeyFile file. The AFS server processes refer to this file to learn the server encryption key when they need to decrypt server tickets.

You also issue several commands that enable the new admin user to issue privileged commands in all of the AFS suites.

The following instructions do not configure all of the security mechanisms related to the AFS Backup System. See the chapter in the IBM AFS Administration Guide about configuring the Backup System.

1. Enter kas interactive mode. Because the machine is in no-authorization checking mode, include the -noauth flag to suppress the Authentication Server's usual prompt for a password.

          # kas  -cell <cell name> -noauth
          ka>

2. Issue the kas create command to create Authentication Database entries called admin and afs.

   Do not provide passwords on the command line. Instead provide them as afs_passwd and admin_passwd in response to the kas command interpreter's prompts as shown, so that they do not appear on the standard output stream.

   You need to enter the afs_passwd string only in this step and in Step 7, so provide a value that is as long and complex as possible, preferably including numerals, punctuation characters, and both uppercase and lowercase letters. Also make the admin_passwd as long and complex as possible, but keep in mind that administrators need to enter it often. Both passwords must be at least six characters long.

          ka> create afs
          initial_password:  afs_passwd
          Verifying, please re-enter initial_password: afs_passwd

          ka> create admin
          initial_password: admin_passwd
          Verifying, please re-enter initial_password: admin_passwd

3. Issue the kas examine command to display the afs entry. The output includes a checksum generated by encrypting a constant with the server encryption key derived from the afs_passwd string. In Step 8 you issue the bos listkeys command to verify that the checksum in its output matches the checksum in this output.

          ka> examine afs
          User data for afs
           key (0) cksum is checksum . . .

4. Issue the kas setfields command to turn on the `ADMIN` flag in the admin entry. This enables the admin user to issue privileged kas commands. Then issue the kas examine command to verify that the `ADMIN` flag appears in parentheses on the first line of the output, as shown in the example.

          ka> setfields admin -flags admin

          ka> examine admin
          User data for admin (ADMIN) . . .

5. Issue the kas quit command to leave kas interactive mode.

          ka> quit

6. Issue the bos adduser command to add the admin user to the /usr/afs/etc/UserList file. This enables the admin user to issue privileged bos and vos commands.

          # ./bos adduser <machine name> admin -cell <cell name> -noauth

7. Issue the bos addkey command to define the AFS server encryption key in the /usr/afs/etc/KeyFile file.

   Do not provide the password on the command line. Instead provide it as afs_passwd in response to the bos command interpreter's prompts, as shown. Provide the same string as in Step 2.

          # ./bos addkey <machine name> -kvno 0 -cell <cell name>  -noauth
          Input key: afs_passwd
          Retype input key: afs_passwd

8. Issue the bos listkeys command to verify that the checksum for the new key in the KeyFile file is the same as the checksum for the key in the Authentication Database's afs entry, which you displayed in Step 3.

          # ./bos listkeys <machine name> -cell <cell name> -noauth
          key 0 has cksum checksum

   You can safely ignore any error messages indicating that bos failed to get tickets or that authentication failed.

   If the keys are different, issue the following commands, making sure that the afs_passwd string is the same in each case. The checksum strings reported by the kas examine and bos listkeys commands must match; if they do not, repeat these instructions until they do, using the -kvno argument to increment the key version number each time.

          # ./kas  -cell <cell name> -noauth

          ka> setpassword afs -kvno 1
          new_password: afs_passwd
          Verifying, please re-enter initial_password: afs_passwd

          ka> examine afs
          User data for afs
           key (1) cksum is checksum . . .

          ka> quit

          # ./bos addkey <machine name> -kvno 1 -cell <cell name> -noauth
          Input key: afs_passwd
          Retype input key: afs_passwd

          # ./bos listkeys <machine name> -cell <cell name> -noauth
          key 1 has cksum checksum

9. Issue the pts createuser command to create a Protection Database entry for the admin user.

   By default, the Protection Server assigns AFS UID 1 (one) to the admin user, because it is the first user entry you are creating. If the local password file (/etc/passwd or equivalent) already has an entry for admin that assigns it a UNIX UID other than 1, it is best to use the -id argument to the pts createuser command to make the new AFS UID match the existing UNIX UID. Otherwise, it is best to accept the default.

          # ./pts createuser -name admin -cell <cell name> [-id <AFS UID>]  -noauth
          User admin has id AFS UID

10. Issue the pts adduser command to make the admin user a member of the system:administrators group, and the pts membership command to verify the new membership. Membership in the group enables the admin user to issue privileged pts commands and some privileged fs commands.

           # ./pts adduser admin system:administrators -cell <cell name> -noauth

           # ./pts membership admin -cell  <cell name> -noauth
           Groups admin (id: 1) is a member of:
             system:administrators

11. Issue the bos restart command with the -all flag to restart the database server processes, so that they start using the new server encryption key.

           # ./bos restart <machine name> -all -cell <cell name> -noauth

## Starting the File Server, Volume Server, and Salvager

Start the fs process, which consists of the File Server, Volume Server, and Salvager (fileserver, volserver and salvager processes).

1. Issue the bos create command to start the fs process. The command appears here on multiple lines only for legibility.

          # ./bos create  <machine name> fs fs /usr/afs/bin/fileserver   \
                          /usr/afs/bin/volserver /usr/afs/bin/salvager  \
                          -cell <cell name>  -noauth

   Sometimes a message about Volume Location Database (VLDB) initialization appears, along with one or more instances of an error message similar to the following:

          FSYNC_clientInit temporary failure (will retry)

   This message appears when the volserver process tries to start before the fileserver process has completed its initialization. Wait a few minutes after the last such message before continuing, to guarantee that both processes have started successfully.

   You can verify that the fs process has started successfully by issuing the bos status command. Its output mentions two `proc starts`.

          # ./bos status <machine name> fs -long -noauth

2. Your next action depends on whether you have ever run AFS file server machines in the cell:

   - If you are installing the first AFS server machine ever in the cell (that is, you are not upgrading the AFS software from a previous version), create the first AFS volume, root.afs.

     For the partition name argument, substitute the name of one of the machine's AFS server partitions (such as /vicepa).

            # ./vos create  <machine name> <partition name> root.afs   \
                            -cell <cell name>  -noauth

     The Volume Server produces a message confirming that it created the volume on the specified partition. You can ignore error messages indicating that tokens are missing, or that authentication failed.

   - If there are existing AFS file server machines and volumes in the cell, issue the vos syncvldb and vos syncserv commands to synchronize the VLDB with the actual state of volumes on the local machine. To follow the progress of the synchronization operation, which can take several minutes, use the -verbose flag.

            # ./vos syncvldb <machine name> -cell <cell name> -verbose  -noauth

            # ./vos syncserv <machine name> -cell <cell name> -verbose  -noauth

     You can ignore error messages indicating that tokens are missing, or that authentication failed.

## Starting the Server Portion of the Update Server

Start the server portion of the Update Server (the upserver process), to distribute the contents of directories on this machine to other server machines in the cell. It becomes active when you configure the client portion of the Update Server on additional server machines.

Distributing the contents of its /usr/afs/etc directory makes this machine the cell's system control machine. The other server machines in the cell run the upclientetc process (an instance of the client portion of the Update Server) to retrieve the configuration files. Use the -crypt argument to the upserver initialization command to specify that the Update Server distributes the contents of the /usr/afs/etc directory only in encrypted form, as shown in the following instruction. Several of the files in the directory, particularly the KeyFile file, are crucial to cell security and so must never cross the network unencrypted.

(You can choose not to configure a system control machine, in which case you must update the configuration files in each server machine's /usr/afs/etc directory individually. The bos commands used for this purpose also encrypt data before sending it across the network.)

Distributing the contents of its /usr/afs/bin directory to other server machines of its system type makes this machine a binary distribution machine. The other server machines of its system type run the upclientbin process (an instance of the client portion of the Update Server) to retrieve the binaries.

The binaries in the /usr/afs/bin directory are not sensitive, so it is not necessary to encrypt them before transfer across the network. Include the -clear argument to the upserver initialization command to specify that the Update Server distributes the contents of the /usr/afs/bin directory in unencrypted form unless an upclientbin process requests encrypted transfer.

Note that the server and client portions of the Update Server always mutually authenticate with one another, regardless of whether you use the -clear or -crypt arguments. This protects their communications from eavesdropping to some degree.

For more information on the upclient and upserver processes, see their reference pages in the IBM AFS Administration Reference. The commands appear on multiple lines here only for legibility.

1. Issue the bos create command to start the upserver process.

          # ./bos create  <machine name> upserver simple  \
                    "/usr/afs/bin/upserver  -crypt /usr/afs/etc    \
                    -clear /usr/afs/bin" -cell <cell name>  -noauth

## Starting the Controller for NTPD

Keeping the clocks on all server and client machines in your cell synchronized is crucial to several functions, and in particular to the correct operation of AFS's distributed database technology, Ubik. The chapter in the IBM AFS Administration Guide about administering server machines explains how time skew can disturb Ubik's performance and cause service outages in your cell.

The AFS distribution includes a version of the Network Time Protocol Daemon (NTPD) for synchronizing the clocks on server machines. If a time synchronization program is not already running on the machine, then in this section you start the runntp process to configure NTPD for use with AFS.

Note:

Do not run the runntp process if NTPD or another time synchronization protocol is already running on the machine. Some versions of some operating systems run a time synchronization program by default, as detailed in the IBM AFS Release Notes.

Attempting to run multiple instances of the NTPD causes an error. Running NTPD together with another time synchronization protocol is unnecessary and can cause instability in the clock setting.

If you run the runntp process and your cell has reliable network connectivity to machines outside your cell, then it is conventional to configure the first AFS machine to refer to a time source outside the cell. When you later install the runntp program on other server machines in the cell, it configures NTPD to choose a time source at random from among the database server machines listed in the /usr/afs/etc/CellServDB file. Time synchronization therefore works in a chained manner: this database server machine refers to a time source outside the cell, the database server machines refer to the machine among them that has access to the most accurate time (NTPD itself includes code for determining this), and each non-database server machine refers to a local database server machine chosen at random from the /usr/afs/etc/CellServDB file. If you ever decide to remove database server functionality from this machine, it is best to transfer responsibility for consulting an external time source to a remaining database server machine.

If your cell does not have network connectivity to external machines, or if the connectivity is not reliable, include the -localclock flag to the runntp command as indicated in the following instructions. The flag tells NTPD to rely on the machine's internal clock when all external time sources are inaccessible. The runntp command has other arguments that are possibly useful given your cell configuration; see the IBM AFS Administration Reference.

Choosing an appropriate external time source is important, but involves more considerations than can be discussed here. If you need help in selecting a source, contact the AFS Product Support group.

As the runntp process initializes NTPD, trace messages sometimes appear on the standard output stream. You can ignore them, but they can be informative if you understand how NTPD works.

1. Issue the bos create command to start the runntp process. For the host argument, substitute the fully-qualified hostname or IP address of one or more machines outside the cell that are to serve as time sources. Separate each name with a space.

   - If your cell usually has reliable network connectivity to an external time source, use the following command:

            # ./bos create  <machine name>   runntp simple   \
                 "/usr/afs/bin/runntp <host>+"  -cell <cell name>  -noauth

   - If your cell does not have network connectivity to an external time source, use the following command:

            # ./bos create  <machine name> runntp simple  \
                 "/usr/afs/bin/runntp -localclock"  -cell <cell name>  -noauth

   - If your cell has network connectivity to an external time source, but the network connection is frequently interrupted, use the following command:

            # ./bos create  <machine name> runntp simple  \
                  "/usr/afs/bin/runntp -localclock <host>+"  \
                  -cell <cell name>  -noauth

## Overview: Installing Client Functionality

The machine you are installing is now an AFS file server machine, database server machine, system control machine, and binary distribution machine. Now make it a client machine by completing the following tasks:

1. Define the machine's cell membership for client processes

2. Create the client version of the CellServDB file

3. Define cache location and size

4. Create the /afs directory and start the Cache Manager

## Copying Client Files to the Local Disk

Before installing and configuring the AFS client, copy the necessary files from the AFS CD-ROM to the local /usr/vice/etc directory.

1. On the local /cdrom directory, mount the AFS CD-ROM for this machine's system type, if it is not already. For instructions on mounting CD-ROMs (either locally or remotely via NFS), consult the operating system documentation.

2. Copy files to the local /usr/vice/etc directory.

   This step places a copy of the AFS initialization script (and related files, if applicable) into the /usr/vice/etc directory. In the preceding instructions for incorporating AFS into the kernel, you copied the script directly to the operating system's conventional location for initialization files. When you incorporate AFS into the machine's startup sequence in a later step, you can choose to link the two files.

   On some system types that use a dynamic kernel loader program, you previously copied AFS library files into a subdirectory of the /usr/vice/etc directory. On other system types, you copied the appropriate AFS library file directly to the directory where the operating system accesses it. The following commands do not copy or recopy the AFS library files into the /usr/vice/etc directory, because on some system types the library files consume a large amount of space. If you want to copy them, add the -r flag to the first cp command and skip the second cp command.

          # cd /cdrom/sysname/root.client/usr/vice/etc

          # cp -p  *  /usr/vice/etc

          # cp -rp  C  /usr/vice/etc

## Defining Cell Membership for Client Processes

Every AFS client machine has a copy of the /usr/vice/etc/ThisCell file on its local disk to define the machine's cell membership for the AFS client programs that run on it. The ThisCell file you created in the /usr/afs/etc directory (in Defining Cell Name and Membership for Server Processes) is used only by server processes.

Among other functions, the ThisCell file on a client machine determines the following:

- The cell in which users authenticate when they log onto the machine, assuming it is using an AFS-modified login utility

- The cell in which users authenticate by default when they issue the klog command

- The cell membership of the AFS server processes that the AFS command interpreters on this machine contact by default

1. Change to the /usr/vice/etc directory and remove the symbolic link created in Starting the BOS Server.

          # cd /usr/vice/etc

          # rm ThisCell

2. Create the ThisCell file as a copy of the /usr/afs/etc/ThisCell file. Defining the same local cell for both server and client processes leads to the most consistent AFS performance.

          # cp  /usr/afs/etc/ThisCell  ThisCell

## Creating the Client CellServDB File

The /usr/vice/etc/CellServDB file on a client machine's local disk lists the database server machines for each cell that the local Cache Manager can contact. If there is no entry in the file for a cell, or if the list of database server machines is wrong, then users working on this machine cannot access the cell. The chapter in the IBM AFS Administration Guide about administering client machines explains how to maintain the file after creating it.

As the afsd program initializes the Cache Manager, it copies the contents of the CellServDB file into kernel memory. The Cache Manager always consults the list in kernel memory rather than the CellServDB file itself. Between reboots of the machine, you can use the fs newcell command to update the list in kernel memory directly; see the chapter in the IBM AFS Administration Guide about administering client machines.

The AFS distribution includes the file CellServDB.sample, and you have already copied it to the /usr/vice/etc directory. It includes an entry for all AFS cells that agreed to share their database server machine information at the time your AFS CD-ROM was created. The AFS Product Support group also maintains a copy of the file, updating it as necessary. If you are interested in participating in the global AFS namespace, it is a good policy to consult the file occasionally for updates. Ask the AFS Product Support group for a pointer to its location.

The CellServDB.sample file can be a good basis for the client CellServDB file, because all of the entries in it use the correct format. You can add or remove cell entries as you see fit. Later (in Enabling Access to Foreign Cells) you perform additional steps that enable the Cache Manager actually to reach the cells.

In this section, you add an entry for the local cell to the local CellServDB file. The current working directory is still /usr/vice/etc.

1. Remove the symbolic link created in Starting the BOS Server and rename the CellServDB.sample file to CellServDB.

          # rm CellServDB

          # mv CellServDB.sample CellServDB

2. Add an entry for the local cell to the CellServDB file. One easy method is to use the cat command to append the contents of the server /usr/afs/etc/CellServDB file to the client version.

           # cat  /usr/afs/etc/CellServDB >>  CellServDB

   Then open the file in a text editor to verify that there are no blank lines, and that all entries have the required format, which is described just following. The ordering of cells is not significant, but it can be convenient to have the client machine's home cell at the top; move it there now if you wish.

   - The first line of a cell's entry has the following format:

            >cell_name      #organization

     where cell_name is the cell's complete Internet domain name (for example, abc.com) and organization is an optional field that follows any number of spaces and the number sign (`#`). By convention it names the organization to which the cell corresponds (for example, the ABC Corporation).

   - After the first line comes a separate line for each database server machine. Each line has the following format:

            IP_address   #machine_name

     where IP_address is the machine's IP address in dotted decimal format (for example, 192.12.105.3). Following any number of spaces and the number sign (`#`) is machine_name, the machine's fully-qualified hostname (for example, db1.abc.com). In this case, the number sign does not indicate a comment; machine_name is a required field.

3. If the file includes cells that you do not wish users of this machine to access, remove their entries.

The following example shows entries for two cells, each of which has three database server machines:

       >abc.com       #ABC Corporation (home cell)
       192.12.105.3      #db1.abc.com
       192.12.105.4      #db2.abc.com
       192.12.105.55     #db3.abc.com
       >stateu.edu    #State University cell
       138.255.68.93     #serverA.stateu.edu
       138.255.68.72     #serverB.stateu.edu
       138.255.33.154    #serverC.stateu.edu

## Configuring the Cache

The Cache Manager uses a cache on the local disk or in machine memory to store local copies of files fetched from file server machines. As the afsd program initializes the Cache Manager, it sets basic cache configuration parameters according to definitions in the local /usr/vice/etc/cacheinfo file. The file has three fields:

1. The first field names the local directory on which to mount the AFS filespace. The conventional location is the /afs directory.

2. The second field defines the local disk directory to use for the disk cache. The conventional location is the /usr/vice/cache directory, but you can specify an alternate directory if another partition has more space available. There must always be a value in this field, but the Cache Manager ignores it if the machine uses a memory cache.

3. The third field specifies the number of kilobyte (1024 byte) blocks to allocate for the cache.

The values you define must meet the following requirements.

- On a machine using a disk cache, the Cache Manager expects always to be able to use the amount of space specified in the third field. Failure to meet this requirement can cause serious problems, some of which can be repaired only by rebooting. You must prevent non-AFS processes from filling up the cache partition. The simplest way is to devote a partition to the cache exclusively.

- The amount of space available in memory or on the partition housing the disk cache directory imposes an absolute limit on cache size.

- The maximum supported cache size can vary in each AFS release; see the IBM AFS Release Notes for the current version.

- For a disk cache, you cannot specify a value in the third field that exceeds 95% of the space available on the partition mounted at the directory named in the second field. If you violate this restriction, the afsd program exits without starting the Cache Manager and prints an appropriate message on the standard output stream. A value of 90% is more appropriate on most machines. Some operating systems (such as AIX) do not automatically reserve some space to prevent the partition from filling completely; for them, a smaller value (say, 80% to 85% of the space available) is more appropriate.

- For a memory cache, you must leave enough memory for other processes and applications to run. If you try to allocate more memory than is actually available, the afsd program exits without initializing the Cache Manager and produces the following message on the standard output stream.

         afsd: memCache allocation failure at number KB

  The number value is how many kilobytes were allocated just before the failure, and so indicates the approximate amount of memory available.

Within these hard limits, the factors that determine appropriate cache size include the number of users working on the machine, the size of the files with which they work, and (for a memory cache) the number of processes that run on the machine. The higher the demand from these factors, the larger the cache needs to be to maintain good performance.

Disk caches smaller than 10 MB do not generally perform well. Machines serving multiple users usually perform better with a cache of at least 60 to 70 MB. The point at which enlarging the cache further does not really improve performance depends on the factors mentioned previously and is difficult to predict.

Memory caches smaller than 1 MB are nonfunctional, and the performance of caches smaller than 5 MB is usually unsatisfactory. Suitable upper limits are similar to those for disk caches but are probably determined more by the demands on memory from other sources on the machine (number of users and processes). Machines running only a few processes possibly can use a smaller memory cache.

### Configuring a Disk Cache

Note: | Not all file system types that an operating system supports are necessarily supported for use as the cache partition. For possible restrictions, see the IBM AFS Release Notes.

To configure the disk cache, perform the following procedures:

1. Create the local directory to use for caching. The following instruction shows the conventional location, /usr/vice/cache. If you are devoting a partition exclusively to caching, as recommended, you must also configure it, make a file system on it, and mount it at the directory created in this step.

          # mkdir /usr/vice/cache

2. Create the cacheinfo file to define the configuration parameters discussed previously. The following instruction shows the standard mount location, /afs, and the standard cache location, /usr/vice/cache.

          # echo "/afs:/usr/vice/cache:#blocks" > /usr/vice/etc/cacheinfo

   The following example defines the disk cache size as 50,000 KB:

          # echo "/afs:/usr/vice/cache:50000" > /usr/vice/etc/cacheinfo

### Configuring a Memory Cache

To configure a memory cache, create the cacheinfo file to define the configuration parameters discussed previously. The following instruction shows the standard mount location, /afs, and the standard cache location, /usr/vice/cache (though the exact value of the latter is irrelevant for a memory cache).

       # echo "/afs:/usr/vice/cache:#blocks" > /usr/vice/etc/cacheinfo

The following example allocates 25,000 KB of memory for the cache.

       # echo "/afs:/usr/vice/cache:25000" > /usr/vice/etc/cacheinfo

## Configuring the Cache Manager

By convention, the Cache Manager mounts the AFS filespace on the local /afs directory. In this section you create that directory.

The afsd program sets several cache configuration parameters as it initializes the Cache Manager, and starts daemons that improve performance. You can use the afsd command's arguments to override the parameters' default values and to change the number of some of the daemons. Depending on the machine's cache size, its amount of RAM, and how many people work on it, you can sometimes improve Cache Manager performance by overriding the default values. For a discussion of all of the afsd command's arguments, see its reference page in the IBM AFS Administration Reference.

The afsd command line in the AFS initialization script on each system type includes an `OPTIONS` variable. You can use it to set nondefault values for the command's arguments, in one of the following ways:

- You can create an afsd options file that sets values for arguments to the afsd command. If the file exists, its contents are automatically substituted for the `OPTIONS` variable in the AFS initialization script. The AFS distribution for some system types includes an options file; on other system types, you must create it.

  You use two variables in the AFS initialization script to specify the path to the options file: `CONFIG` and `AFSDOPT`. On system types that define a conventional directory for configuration files, the `CONFIG` variable indicates it by default; otherwise, the variable indicates an appropriate location.

  List the desired afsd options on a single line in the options file, separating each option with one or more spaces. The following example sets the -stat argument to 2500, the -daemons argument to 4, and the -volumes argument to 100.

         -stat 2500 -daemons 4 -volumes 100

- On a machine that uses a disk cache, you can set the `OPTIONS` variable in the AFS initialization script to one of `$SMALL`, `$MEDIUM`, or `$LARGE`. The AFS initialization script uses one of these settings if the afsd options file named by the `AFSDOPT` variable does not exist. In the script as distributed, the `OPTIONS` variable is set to the value `$MEDIUM`.

  Note: | Do not set the `OPTIONS` variable to `$SMALL`, `$MEDIUM`, or `$LARGE` on a machine that uses a memory cache. The arguments it sets are appropriate only on a machine that uses a disk cache.

  The script (or on some system types the afsd options file named by the `AFSDOPT` variable) defines a value for each of `SMALL`, `MEDIUM`, and `LARGE` that sets afsd command arguments appropriately for client machines of different sizes:

  - `SMALL` is suitable for a small machine that serves one or two users and has approximately 8 MB of RAM and a 20-MB cache

  - `MEDIUM` is suitable for a medium-sized machine that serves two to six users and has 16 MB of RAM and a 40-MB cache

  - `LARGE` is suitable for a large machine that serves five to ten users and has 32 MB of RAM and a 100-MB cache

- You can choose not to create an afsd options file and to set the `OPTIONS` variable in the initialization script to a null value rather than to the default `$MEDIUM` value. You can then either set arguments directly on the afsd command line in the script, or set no arguments (and so accept default values for all Cache Manager parameters).

1. Create the local directory on which to mount the AFS filespace, by convention /afs. If the directory already exists, verify that it is empty.

          # mkdir /afs

2. On AIX systems, add the following line to the /etc/vfs file. It enables AIX to unmount AFS correctly during shutdown.

          afs     4     none     none

3. On Linux systems, copy the afsd options file from the /usr/vice/etc directory to the /etc/sysconfig directory, removing the .conf extension as you do so.

          # cp /usr/vice/etc/afs.conf /etc/sysconfig/afs

4. Edit the machine's AFS initialization script or afsd options file to set appropriate values for afsd command parameters. The script resides in the indicated location on each system type:

   - On AIX systems, /etc/rc.afs

   - On Digital UNIX systems, /sbin/init.d/afs

   - On HP-UX systems, /sbin/init.d/afs

   - On IRIX systems, /etc/init.d/afs

   - On Linux systems, /etc/sysconfig/afs (the afsd options file)

   - On Solaris systems, /etc/init.d/afs

   Use one of the methods described in the introduction to this section to add the following flags to the afsd command line. If you intend for the machine to remain an AFS client, also set any performance-related arguments you wish.

   - Add the -nosettime flag, because this is a file server machine that is also a client. The flag prevents the machine from picking a file server machine in the cell as its source for the correct time, which client machines normally do. File server machines instead use NTPD (as controlled by the runntp process) or another protocol to synchronize their clocks.

   - Add the -memcache flag if the machine is to use a memory cache.

   - Add the -verbose flag to display a trace of the Cache Manager's initialization on the standard output stream.

## Overview: Completing the Installation of the First AFS Machine

The machine is now configured as an AFS file server and client machine. In this final phase of the installation, you initialize the Cache Manager and then create the upper levels of your AFS filespace, among other procedures. The procedures are:

1. Verify that the initialization script works correctly, and incorporate it into the operating system's startup and shutdown sequence

2. Create and mount top-level volumes

3. Create and mount volumes to store system binaries in AFS

4. Enable access to foreign cells

5. Institute additional security measures

6. Remove client functionality if desired

## Verifying the AFS Initialization Script

At this point you run the AFS initialization script to verify that it correctly invokes all of the necessary programs and AFS processes, and that they start correctly. The following are the relevant commands:

- The command that dynamically loads AFS modifications into the kernel, on some system types (not applicable if the kernel has AFS modifications built in)

- The bosserver command, which starts the BOS Server; it in turn starts the server processes for which you created entries in the /usr/afs/local/BosConfig file

- The afsd command, which initializes the Cache Manager

On system types that use a dynamic loader program, you must reboot the machine before running the initialization script, so that it can freshly load AFS modifications into the kernel.

If there are problems during the initialization, attempt to resolve them. The AFS Product Support group can provide assistance if necessary.

1. Issue the bos shutdown command to shut down the AFS server processes other than the BOS Server. Include the -wait flag to delay return of the command shell prompt until all processes shut down completely.

          # /usr/afs/bin/bos shutdown <machine name> -wait

2. Issue the ps command to learn the bosserver process's process ID number (PID), and then the kill command to stop it.

          # ps appropriate_ps_options | grep bosserver

          # kill bosserver_PID

3. Issue the appropriate commands to run the AFS initialization script for this system type.

   On AIX systems:

   1. Reboot the machine and log in again as the local superuser root.

             # cd /

             # shutdown -r now

             login: root
             Password: root_password

   2. Run the AFS initialization script.

             # /etc/rc.afs

   On Digital UNIX systems:

   1. Run the AFS initialization script.

             # /sbin/init.d/afs  start

   On HP-UX systems:

   1. Run the AFS initialization script.

             # /sbin/init.d/afs  start

   On IRIX systems:

   1. If you have configured the machine to use the ml dynamic loader program, reboot the machine and log in again as the local superuser root.

             # cd /

             # shutdown -i6 -g0 -y

             login: root
             Password: root_password

   2. Issue the chkconfig command to activate the afsserver and afsclient configuration variables.

             # /etc/chkconfig -f afsserver on

             # /etc/chkconfig -f afsclient on

   3. Run the AFS initialization script.

             # /etc/init.d/afs  start

   On Linux systems:

   1. Reboot the machine and log in again as the local superuser root.

             # cd /

             # shutdown -r now

             login: root
             Password: root_password

   2. Run the AFS initialization script.

             # /etc/rc.d/init.d/afs  start

   On Solaris systems:

   1. Reboot the machine and log in again as the local superuser root.

             # cd /

             # shutdown -i6 -g0 -y

             login: root
             Password: root_password

   2. Run the AFS initialization script.

             # /etc/init.d/afs  start

4. Wait for the message that confirms that Cache Manager initialization is complete.

   On machines that use a disk cache, it can take a while to initialize the Cache Manager for the first time, because the afsd program must create all of the V n files in the cache directory. Subsequent Cache Manager initializations do not take nearly as long, because the V n files already exist.

   As a basic test of correct AFS functioning, issue the klog command to authenticate as the admin user. Provide the password (admin_passwd) you defined in Initializing Cell Security.

          # /usr/afs/bin/klog admin
          Password:  admin_passwd

5. Issue the tokens command to verify that the klog command worked correctly. If it did, the output looks similar to the following example for the abc.com cell, where admin's AFS UID is 1. If the output does not seem correct, resolve the problem. Changes to the AFS initialization script are possibly necessary. The AFS Product Support group can provide assistance as necessary.

          # /usr/afs/bin/tokens
          Tokens held by the Cache Manager:

          User's (AFS ID 1) tokens for afs@abc.com [Expires May 22 11:52]
              --End of list--

6. Issue the bos status command to verify that the output for each process reads `Currently running normally`.

          # /usr/afs/bin/bos status <machine name>

7. Change directory to the local file system root (/) and issue the fs checkvolumes command.

          # cd /

          # /usr/afs/bin/fs checkvolumes

## Activating the AFS Initialization Script

Now that you have confirmed that the AFS initialization script works correctly, take the action necessary to have it run automatically at each reboot. Proceed to the instructions for your system type:

- Activating the Script on AIX Systems

- Activating the Script on Digital UNIX Systems

- Activating the Script on HP-UX Systems

- Activating the Script on IRIX Systems

- Activating the Script on Linux Systems

- Activating the Script on Solaris Systems

### Activating the Script on AIX Systems

1. Edit the AIX initialization file, /etc/inittab, adding the following line to invoke the AFS initialization script. Place it just after the line that starts NFS daemons.

          rcafs:2:wait:/etc/rc.afs > /dev/console 2>&1 # Start AFS services

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /etc directories. If you want to avoid potential confusion by guaranteeing that they are always the same, create a link between them. You can always retrieve the original script from the AFS CD-ROM if necessary.

          # cd  /usr/vice/etc

          # rm  rc.afs

          # ln -s  /etc/rc.afs

3. Proceed to Configuring the Top Levels of the AFS Filespace.

### Activating the Script on Digital UNIX Systems

1. Change to the /sbin/init.d directory and issue the ln -s command to create symbolic links that incorporate the AFS initialization script into the Digital UNIX startup and shutdown sequence.

          # cd  /sbin/init.d

          # ln -s  ../init.d/afs  /sbin/rc3.d/S67afs

          # ln -s  ../init.d/afs  /sbin/rc0.d/K66afs

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /sbin/init.d directories. If you want to avoid potential confusion by guaranteeing that they are always the same, create a link between them. You can always retrieve the original script from the AFS CD-ROM if necessary.

          # cd /usr/vice/etc

          # rm afs.rc

          # ln -s  /sbin/init.d/afs  afs.rc

3. Proceed to Configuring the Top Levels of the AFS Filespace.

### Activating the Script on HP-UX Systems

1. Change to the /sbin/init.d directory and issue the ln -s command to create symbolic links that incorporate the AFS initialization script into the HP-UX startup and shutdown sequence.

          # cd /sbin/init.d

          # ln -s ../init.d/afs /sbin/rc2.d/S460afs

          # ln -s ../init.d/afs /sbin/rc2.d/K800afs

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /sbin/init.d directories. If you want to avoid potential confusion by guaranteeing that they are always the same, create a link between them. You can always retrieve the original script from the AFS CD-ROM if necessary.

          # cd /usr/vice/etc

          # rm afs.rc

          # ln -s  /sbin/init.d/afs  afs.rc

3. Proceed to Configuring the Top Levels of the AFS Filespace.

### Activating the Script on IRIX Systems

1. Change to the /etc/init.d directory and issue the ln -s command to create symbolic links that incorporate the AFS initialization script into the IRIX startup and shutdown sequence.

          # cd /etc/init.d

          # ln -s ../init.d/afs /etc/rc2.d/S35afs

          # ln -s ../init.d/afs /etc/rc0.d/K35afs

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /etc/init.d directories. If you want to avoid potential confusion by guaranteeing that they are always the same, create a link between them. You can always retrieve the original script from the AFS CD-ROM if necessary.

          # cd /usr/vice/etc

          # rm afs.rc

          # ln -s  /etc/init.d/afs  afs.rc

3. Proceed to Configuring the Top Levels of the AFS Filespace.

### Activating the Script on Linux Systems

1. Issue the chkconfig command to activate the afs configuration variable. Based on the instruction in the AFS initialization file that begins with the string `#chkconfig`, the command automatically creates the symbolic links that incorporate the script into the Linux startup and shutdown sequence.

          # /sbin/chkconfig  --add afs

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /etc/rc.d/init.d directories, and copies of the afsd options file in both the /usr/vice/etc and /etc/sysconfig directories. If you want to avoid potential confusion by guaranteeing that the two copies of each file are always the same, create a link between them. You can always retrieve the original script or options file from the AFS CD-ROM if necessary.

          # cd /usr/vice/etc

          # rm afs.rc afs.conf

          # ln -s  /etc/rc.d/init.d/afs  afs.rc

          # ln -s  /etc/sysconfig/afs  afs.conf

3. Proceed to Configuring the Top Levels of the AFS Filespace.

### Activating the Script on Solaris Systems

1. Change to the /etc/init.d directory and issue the ln -s command to create symbolic links that incorporate the AFS initialization script into the Solaris startup and shutdown sequence.

          # cd /etc/init.d

          # ln -s ../init.d/afs /etc/rc3.d/S99afs

          # ln -s ../init.d/afs /etc/rc0.d/K66afs

2. (Optional) There are now copies of the AFS initialization file in both the /usr/vice/etc and /etc/init.d directories. If you want to avoid potential confusion by guaranteeing that they are always the same, create a link between them. You can always retrieve the original script from the AFS CD-ROM if necessary.

          # cd /usr/vice/etc

          # rm afs.rc

          # ln -s  /etc/init.d/afs  afs.rc

## Configuring the Top Levels of the AFS Filespace

If you have not previously run AFS in your cell, you now configure the top levels of your cell's AFS filespace. If you have run a previous version of AFS, the filespace is already configured. Proceed to Storing AFS Binaries in AFS.

You created the root.afs volume in Starting the File Server, Volume Server, and Salvager, and the Cache Manager mounted it automatically on the local /afs directory when you ran the AFS initialization script in Verifying the AFS Initialization Script. You now set the access control list (ACL) on the /afs directory; creating, mounting, and setting the ACL are the three steps required when creating any volume.

After setting the ACL on the root.afs volume, you create your cell's root.cell volume, mount it as a subdirectory of the /afs directory, and set the ACL. Create both a read/write and a regular mount point for the root.cell volume. The read/write mount point enables you to access the read/write version of replicated volumes when necessary. Creating both mount points essentially creates separate read-only and read-write copies of your filespace, and enables the Cache Manager to traverse the filespace on a read-only path or read/write path as appropriate. For further discussion of these concepts, see the chapter in the IBM AFS Administration Guide about administering volumes.

Then replicate both the root.afs and root.cell volumes. This is required if you want to replicate any other volumes in your cell, because all volumes mounted above a replicated volume must themselves be replicated in order for the Cache Manager to access the replica.

When the root.afs volume is replicated, the Cache Manager is programmed to access its read-only version (root.afs.readonly) whenever possible. To make changes to the contents of the root.afs volume (when, for example, you mount another cell's root.cell volume at the second level in your filespace), you must mount the root.afs volume temporarily, make the changes, release the volume and remove the temporary mount point. For instructions, see Enabling Access to Foreign Cells.

1. Issue the fs setacl command to edit the ACL on the /afs directory. Add an entry that grants the l (lookup) and r (read) permissions to the system:anyuser group, to enable all AFS users who can reach your cell to traverse through the directory. If you prefer to enable access only to locally authenticated users, substitute the system:authuser group.

   Note that there is already an ACL entry that grants all seven access rights to the system:administrators group. It is a default entry that AFS places on every new volume's root directory.

          # /usr/afs/bin/fs setacl /afs system:anyuser rl

2. Issue the vos create command to create the root.cell volume. Then issue the fs mkmount command to mount it as a subdirectory of the /afs directory, where it serves as the root of your cell's local AFS filespace. Finally, issue the fs setacl command to create an ACL entry for the system:anyuser group (or system:authuser group).

   For the partition name argument, substitute the name of one of the machine's AFS server partitions (such as /vicepa). For the cellname argument, substitute your cell's fully-qualified Internet domain name (such as abc.com).

          # /usr/afs/bin/vos create  <machine name> <partition name> root.cell

          # /usr/afs/bin/fs mkmount /afs/cellname  root.cell

          # /usr/afs/bin/fs setacl /afs/cellname  system:anyuser rl

3. (Optional) Create a symbolic link to a shortened cell name, to reduce the length of pathnames for users in the local cell. For example, in the abc.com cell, /afs/abc is a link to /afs/abc.com.

          # cd /afs

          # ln -s  full_cellname  short_cellname

4. Issue the fs mkmount command to create a read/write mount point for the root.cell volume (you created a regular mount point in Step 2).

   By convention, the name of a read/write mount point begins with a period, both to distinguish it from the regular mount point and to make it visible only when the -a flag is used on the ls command.

   Change directory to /usr/afs/bin to make it easier to access the command binaries.

          # cd /usr/afs/bin

          # ./fs mkmount   /afs/.cellname   root.cell -rw

5. Issue the vos addsite command to define a replication site for both the root.afs and root.cell volumes. In each case, substitute for the partition name argument the partition where the volume's read/write version resides. When you install additional file server machines, it is a good idea to create replication sites on them as well.

          # ./vos addsite <machine name> <partition name> root.afs

          # ./vos addsite <machine name> <partition name> root.cell

6. Issue the fs examine command to verify that the Cache Manager can access both the root.afs and root.cell volumes, before you attempt to replicate them. The output lists each volume's name, volumeID number, quota, size, and the size of the partition that houses them. If you get an error message instead, do not continue before taking corrective action.

          # ./fs examine /afs

          # ./fs examine /afs/cellname

7. Issue the vos release command to release a replica of the root.afs and root.cell volumes to the sites you defined in Step 5.

          # ./vos release root.afs

          # ./vos release root.cell

8. Issue the fs checkvolumes to force the Cache Manager to notice that you have released read-only versions of the volumes, then issue the fs examine command again. This time its output mentions the read-only version of the volumes (root.afs.readonly and root.cell.readonly) instead of the read/write versions, because of the Cache Manager's bias to access the read-only version of the root.afs volume if it exists.

          # ./fs checkvolumes

          # ./fs examine /afs

          # ./fs examine /afs/cellname

## Storing AFS Binaries in AFS

In the conventional configuration, you make AFS client binaries and configuration files available in the subdirectories of the /usr/afsws directory on client machines (afsws is an acronym for AFS w ork s tation). You can conserve local disk space by creating /usr/afsws as a link to an AFS volume that houses the AFS client binaries and configuration files for this system type.

In this section you create the necessary volumes. The conventional location to which to link /usr/afsws is /afs/cellname/sysname/usr/afsws, where sysname is the appropriate system type name as specified in the IBM AFS Release Notes. The instructions in Installing Additional Client Machines assume that you have followed the instructions in this section.

If you have previously run AFS in the cell, the volumes possibly already exist. If so, you need to perform Step 8 only.

The current working directory is still /usr/afs/bin, which houses the fs and vos command suite binaries. In the following commands, it is possible you still need to specify the pathname to the commands, depending on how your PATH environment variable is set.

1. Issue the vos create command to create volumes for storing the AFS client binaries for this system type. The following example instruction creates volumes called sysname, sysname.usr, and sysname.usr.afsws. Refer to the IBM AFS Release Notes to learn the proper value of sysname for this system type.

          # vos create <machine name> <partition name> sysname

          # vos create <machine name> <partition name> sysname.usr

          # vos create <machine name> <partition name> sysname.usr.afsws

2. Issue the fs mkmount command to mount the newly created volumes. Because the root.cell volume is replicated, you must precede the cellname part of the pathname with a period to specify the read/write mount point, as shown. Then issue the vos release command to release a new replica of the root.cell volume, and the fs checkvolumes command to force the local Cache Manager to access them.

          # fs mkmount -dir /afs/.cellname/sysname -vol sysname

          # fs mkmount -dir /afs/.cellname/sysname/usr  -vol sysname.usr

          # fs mkmount -dir /afs/.cellname/sysname/usr/afsws -vol sysname.usr.afsws

          # vos release root.cell

          # fs checkvolumes

3. Issue the fs setacl command to grant the l (lookup) and r (read) permissions to the system:anyuser group on each new directory's ACL.

          # cd /afs/.cellname/sysname

          # fs setacl  -dir  .  usr  usr/afsws  -acl  system:anyuser rl

4. Issue the fs setquota command to set an unlimited quota on the volume mounted at the /afs/cellname/sysname/usr/afsws directory. This enables you to copy all of the appropriate files from the CD-ROM into the volume without exceeding the volume's quota.

   If you wish, you can set the volume's quota to a finite value after you complete the copying operation. At that point, use the vos examine command to determine how much space the volume is occupying. Then issue the fs setquota command to set a quota that is slightly larger.

          # fs setquota /afs/.cellname/sysname/usr/afsws  0

5. Mount the AFS CD-ROM for this machine's system type on the local /cdrom directory, if it is not already. For instructions on mounting CD-ROMs (either locally or remotely via NFS), consult the operating system documentation.

6. Copy the contents of the indicated directories from the CD-ROM into the /afs/cellname/sysname/usr/afsws directory.

          # cd /afs/.cellname/sysname/usr/afsws

          # cp -rp /cdrom/sysname/bin  .

          # cp -rp /cdrom/sysname/etc  .

          # cp -rp /cdrom/sysname/include  .

          # cp -rp /cdrom/sysname/lib  .

7. Issue the fs setacl command to set the ACL on each directory appropriately. To comply with the terms of your AFS License agreement, you must prevent unauthorized users from accessing AFS software. To enable access for locally authenticated users only, set the ACL on the etc, include, and lib subdirectories to grant the l and r permissions to the system:authuser group rather than the system:anyuser group. The system:anyuser group must retain the l and r permissions on the bin subdirectory to enable unauthenticated users to access the klog binary. To ensure that unauthorized users are not accessing AFS software, check periodically that the ACLs on these directories are set properly.

          # cd /afs/.cellname/sysname/usr/afsws

          # fs setacl  -dir etc include lib  -acl  system:authuser rl  \
                     system:anyuser none

8. Create /usr/afsws on the local disk as a symbolic link to the directory /afs/cellname/@sys/usr/afsws. You can specify the actual system name instead of @sys if you wish, but the advantage of using @sys is that it remains valid if you upgrade this machine to a different system type.

          # ln -s /afs/cellname/@sys/usr/afsws  /usr/afsws

9. (Optional) To enable users to issue commands from the AFS suites (such as fs) without having to specify a pathname to their binaries, include the /usr/afsws/bin and /usr/afsws/etc directories in the PATH environment variable you define in each user's shell initialization file (such as .cshrc).

## Storing AFS Documents in AFS

The AFS distribution includes the following documents:

- IBM AFS Release Notes

- IBM AFS Quick Beginnings

- IBM AFS User Guide

- IBM AFS Administration Reference

- IBM AFS Administration Guide

The AFS CD-ROM for each system type has a top-level Documentation directory, with a subdirectory for each document format provided. The different formats are suitable for online viewing, printing, or both.

This section explains how to create and mount a volume to house the documents, making them available to your users. The recommended mount point for the volume is /afs/cellname/afsdoc. If you wish, you can create a link to the mount point on each client machine's local disk, called /usr/afsdoc. Alternatively, you can create a link to the mount point in each user's home directory. You can also choose to permit users to access only certain documents (most probably, the IBM AFS User Guide) by creating different mount points or setting different ACLs on different document directories.

The current working directory is still /usr/afs/bin, which houses the fs and vos command suite binaries you use to create and mount volumes. In the following commands, it is possible you still need to specify the pathname to the commands, depending on how your PATH environment variable is set.

1. Issue the vos create command to create a volume for storing the AFS documentation. Include the -maxquota argument to set an unlimited quota on the volume. This enables you to copy all of the appropriate files from the CD-ROM into the volume without exceeding the volume's quota.

   If you wish, you can set the volume's quota to a finite value after you complete the copying operations. At that point, use the vos examine command to determine how much space the volume is occupying. Then issue the fs setquota command to set a quota that is slightly larger.

          # vos create  <machine name> <partition name>  afsdoc  -maxquota  0

2. Issue the fs mkmount command to mount the new volume. Because the root.cell volume is replicated, you must precede the cellname with a period to specify the read/write mount point, as shown. Then issue the vos release command to release a new replica of the root.cell volume, and the fs checkvolumes command to force the local Cache Manager to access them.

          # fs mkmount -dir /afs/.cellname/afsdoc -vol afsdoc

          # vos release root.cell

          # fs checkvolumes

3. Issue the fs setacl command to grant the rl permissions to the system:anyuser group on the new directory's ACL.

          # cd /afs/.cellname/afsdoc

          # fs setacl  .  system:anyuser rl

4. Mount the AFS CD-ROM for any system type on the local /cdrom directory, if one is not already. For instructions on mounting CD-ROMs (either locally or remotely via NFS), consult the operating system documentation.

5. Copy the AFS documents in one or more formats from the CD-ROM into subdirectories of the /afs/cellname/afsdoc directory. Repeat the commands for each format.

          # mkdir format_name

          # cd format_name

          # cp -rp /cdrom/Documentation/format  .

   If you choose to store the HTML version of the documents in AFS, note that in addition to a subdirectory for each document there are several files with a .gif extension, which enable readers to move easily between sections of a document. The file called index.htm is an introductory HTML page that contains a hyperlink to each of the documents. For online viewing to work properly, these files must remain in the top-level HTML directory (the one named, for example, /afs/cellname/afsdoc/html).

6. (Optional) If you believe it is helpful to your users to access the AFS documents in a certain format via a local disk directory, create /usr/afsdoc on the local disk as a symbolic link to the documentation directory in AFS (/afs/cellname/afsdoc/format_name).

          # ln -s /afs/cellname/afsdoc/format_name /usr/afsdoc

   An alternative is to create a link in each user's home directory to the /afs/cellname/afsdoc/format_name directory.

## Storing System Binaries in AFS

You can also choose to store other system binaries in AFS volumes, such as the standard UNIX programs conventionally located in local disk directories such as /etc, /bin, and /lib. Storing such binaries in an AFS volume not only frees local disk space, but makes it easier to update binaries on all client machines.

The following is a suggested scheme for storing system binaries in AFS. It does not include instructions, but you can use the instructions in Storing AFS Binaries in AFS (which are for AFS-specific binaries) as a template.

Some files must remain on the local disk for use when AFS is inaccessible (during bootup and file server or network outages). The required binaries include the following:

- A text editor, network commands, and so on

- Files used during the boot sequence before the afsd program runs, such as initialization and configuration files, and binaries for commands that mount file systems

- Files used by dynamic kernel loader programs

In most cases, it is more secure to enable only locally authenticated users to access system binaries, by granting the l (lookup) and r (read) permissions to the system:authuser group on the ACLs of directories that contain the binaries. If users need to access a binary while unauthenticated, however, the ACL on its directory must grant those permissions to the system:anyuser group.

The following chart summarizes the suggested volume and mount point names for storing system binaries. It uses a separate volume for each directory. You already created a volume called sysname for this machine's system type when you followed the instructions in Storing AFS Binaries in AFS.

You can name volumes in any way you wish, and mount them at other locations than those suggested here. However, this scheme has several advantages:

- Volume names clearly identify volume contents

- Using the sysname prefix on every volume makes it is easy to back up all of the volumes together, because the AFS Backup System enables you to define sets of volumes based on a string included in all of their names

- It makes it easy to track related volumes, keeping them together on the same file server machine if desired

- There is a clear relationship between volume name and mount point name

Volume Name | Mount Point
--- | ---
sysname | /afs/cellname/sysname
sysname.bin | /afs/cellname/sysname/bin
sysname.etc | /afs/cellname/sysname/etc
sysname.usr | /afs/cellname/sysname/usr
sysname.usr.afsws | /afs/cellname/sysname/usr/afsws
sysname.usr.bin | /afs/cellname/sysname/usr/bin
sysname.usr.etc | /afs/cellname/sysname/usr/etc
sysname.usr.inc | /afs/cellname/sysname/usr/include
sysname.usr.lib | /afs/cellname/sysname/usr/lib
sysname.usr.loc | /afs/cellname/sysname/usr/local
sysname.usr.man | /afs/cellname/sysname/usr/man
sysname.usr.sys | /afs/cellname/sysname/usr/sys

## Enabling Access to Foreign Cells

In this section you create a mount point in your AFS filespace for the root.cell volume of each foreign cell that you want to enable your users to access. For users working on a client machine to access the cell, there must in addition be an entry for it in the client machine's local /usr/vice/etc/CellServDB file. (The instructions in Creating the Client CellServDB File suggest that you use the CellServDB.sample file included in the AFS distribution as the basis for your cell's client CellServDB file. The sample file lists all of the cells that had agreed to participate in the AFS global namespace at the time your AFS CD-ROM was created. As mentioned in that section, the AFS Product Support group also maintains a copy of the file, updating it as necessary.)

The chapter in the IBM AFS Administration Guide about cell administration and configuration issues discusses the implications of participating in the global AFS namespace. The chapter about administering client machines explains how to maintain knowledge of foreign cells on client machines, and includes suggestions for maintaining a central version of the file in AFS.

1. Issue the fs mkmount command to mount each foreign cell's root.cell volume on a directory called /afs/foreign_cell. Because the root.afs volume is replicated, you must create a temporary mount point for its read/write version in a directory to which you have write access (such as your cell's /afs/.cellname directory). Create the mount points, issue the vos release command to release new replicas to the read-only sites for the root.afs volume, and issue the fs checkvolumes command to force the local Cache Manager to access the new replica.

   Note: | You need to issue the fs mkmount command only once for each foreign cell's root.cell volume. You do not need to repeat the command on each client machine.

   Substitute your cell's name for cellname.

          # cd /afs/.cellname

          # /usr/afs/bin/fs  mkmount  temp  root.afs

   Repeat the fs mkmount command for each foreign cell you wish to mount at this time.

          # /usr/afs/bin/fs mkmount temp/foreign_cell root.cell -c foreign_cell

   Issue the following commands only once.

          # /usr/afs/bin/fs rmmount temp

          # /usr/afs/bin/vos release root.afs

          # /usr/afs/bin/fs checkvolumes

2. If this machine is going to remain an AFS client after you complete the installation, verify that the local /usr/vice/etc/CellServDB file includes an entry for each foreign cell.

   For each cell that does not already have an entry, complete the following instructions:

   1. Create an entry in the CellServDB file. Be sure to comply with the formatting instructions in Creating the Client CellServDB File.

   2. Issue the fs newcell command to add an entry for the cell directly to the list that the Cache Manager maintains in kernel memory. Provide each database server machine's fully qualified hostname.

             # /usr/afs/bin/fs newcell <foreign_cell> <dbserver1>    \
                      [<dbserver2>] [<dbserver3>]

   3. If you plan to maintain a central version of the CellServDB file (the conventional location is /afs/cellname/common/etc/CellServDB), create it now as a copy of the local /usr/vice/etc/CellServDB file. Verify that it includes an entry for each foreign cell you want your users to be able to access.

             # mkdir common

             # mkdir common/etc

             # cp  /usr/vice/etc/CellServDB  common/etc

             # /usr/afs/bin/vos release root.cell

3. Issue the ls command to verify that the new cell's mount point is visible in your filespace. The output lists the directories at the top level of the new cell's AFS filespace.

          # ls /afs/foreign_cell

4. Please register your cell with the AFS Product Support group at this time. If you do not want to participate in the global AFS namespace, they list your cell in a private CellServDB file that is not available to other AFS cells.

## Improving Cell Security

This section discusses ways to improve the security of AFS data in your cell. Also see the chapter in the IBM AFS Administration Guide about configuration and administration issues.

### Controlling root Access

As on any machine, it is important to prevent unauthorized users from logging onto an AFS server or client machine as the local superuser root. Take care to keep the root password secret.

The local root superuser does not have special access to AFS data through the Cache Manager (as members of the system:administrators group do), but it does have the following privileges:

- On client machines, the ability to issue commands from the fs suite that affect AFS performance

- On server machines, the ability to disable authorization checking, or to install rogue process binaries

### Controlling System Administrator Access

Following are suggestions for managing AFS administrative privilege:

- Create an administrative account for each administrator named something like username.admin. Administrators authenticate under these identities only when performing administrative tasks, and destroy the administrative tokens immediately after finishing the task (either by issuing the unlog command, or the klog command to adopt their regular identity).

- Set a short ticket lifetime for administrator accounts (for example, 20 minutes) by using the -lifetime argument to the kas setfields command, which is described in the IBM AFS Administration Reference. Do not however, use a short lifetime for users who issue long-running backup commands.

- Limit the number of system administrators in your cell, especially those who belong to the system:administrators group. By default they have all ACL rights on all directories in the local AFS filespace, and therefore must be trusted not to examine private files.

- Limit the use of system administrator accounts on machines in public areas. It is especially important not to leave such machines unattended without first destroying the administrative tokens.

- Limit the use by administrators of standard UNIX commands that make connections to remote machines (such as the telnet utility). Many of these programs send passwords across the network without encrypting them.

### Protecting Sensitive AFS Directories

Some subdirectories of the /usr/afs directory contain files crucial to cell security. Unauthorized users must not read or write to these files because of the potential for misuse of the information they contain.

As the BOS Server initializes for the first time on a server machine, it creates several files and directories (as mentioned in Starting the BOS Server). It sets their owner to the local superuser root and sets their mode bits to enable writing by the owner only; in some cases, it also restricts reading.

At each subsequent restart, the BOS Server checks that the owner and mode bits on these files are still set appropriately. If they are not, it write the following message to the /usr/afs/logs/BosLog file:

       Bosserver reports inappropriate access on server directories

The BOS Server does not reset the mode bits, which enables you to set alternate values if you wish.

The following charts lists the expected mode bit settings. A question mark indicates that the BOS Server does not check that mode bit.

/usr/afs | `drwxr`?`xr-x`
/usr/afs/backup | `drwx`???`---`
/usr/afs/bin | `drwxr`?`xr-x`
/usr/afs/db | `drwx`???`---`
/usr/afs/etc | `drwxr`?`xr-x`
/usr/afs/etc/KeyFile | `-rw`????`---`
/usr/afs/etc/UserList | `-rw`?????`--`
/usr/afs/local | `drwx`???`---`
/usr/afs/logs | `drwxr`?`xr-x`

## Removing Client Functionality

Follow the instructions in this section only if you do not wish this machine to remain an AFS client. Removing client functionality means that you cannot use this machine to access AFS files.

1. Remove the files from the /usr/vice/etc directory. The command does not remove the directory for files used by the dynamic kernel loader program, if it exists on this system type. Those files are still needed on a server-only machine.

          # cd /usr/vice/etc

          # rm  *

          # rm -rf  C

2. Create symbolic links to the ThisCell and CellServDB files in the /usr/afs/etc directory. This makes it possible to issue commands from the AFS command suites (such as bos and fs) on this machine.

          # ln -s /usr/afs/etc/ThisCell ThisCell

          # ln -s /usr/afs/etc/CellServDB CellServDB

3. On IRIX systems, issue the chkconfig command to deactivate the afsclient configuration variable.

          # /etc/chkconfig -f afsclient off

4. Reboot the machine. Most system types use the shutdown command, but the appropriate options vary.

          # cd /

          # shutdown appropriate_options

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