#!/bin/bash

# Path to DVD/USB Stick
datapath=/media/<user>/UPR_12.04r1
# path to the file containing the MD5 sums
md5datapath=/media/<user>/UPR_12.04r1/md5sum.txt

data=$(grep "./*" ${md5datapath} | cut -d " " -f 3)

for i in $data; do
    md5sum ${datapath}/$i >> ./md5sum_new.txt
done

sed -i 's/\/media\/<user>\/UPR_12\.04r1\///g' ./md5sum_new.txt

diff -s md5sum_new.txt ${md5datapath}
rm ./md5sum_new.txt