Add and remove OpenRC services to and from runlevels. See also
openrc. More information: https://manned.org/rc-update.
rc-update
rc-update {{[-v|--verbose]}}
sudo rc-update add {{service_name}} {{runlevel}}
sudo rc-update {{[del|delete]}} {{service_name}} {{runlevel}}
sudo rc-update {{[-a|--all]}} {{[del|delete]}} {{service_name}}