crc32.sh

#!/bin/bash

# This simple bash script adds a CRC32 to the end of every file in a chosen folder. It will not add them recursively.
# This script needs libarchive-zip-perl (Debian based), perl-Archive-Zip (Red Hat based) installed to be able to run.

# Change this to the folder that have files you want to add CRC32's to.
home="FolderName"

# This filters out those files you want to add a CRC32 to. 
ext="mkv"

while read a; do
    i=`basename "${a}"`;
    crc=`crc32 "${home}/${i}" | awk '{print toupper($0)}'`;
    mv "${home}/${i}" "${home}/${i%%.*} [${crc}].${ext}";
done < <(find "${home}/" -type f -name \*.${ext})

Thanks, but you should change the extension of the file to sh.

@Fiwi1265 Thanks for reminding me, I did it way back as a joke to a friend as he kept naming his bash files as .bat and forgot to change it back.