Bash script to add a file's hash to it's own filename

addhash

#!/bin/bash

# Put this file in your /usr/local/bin directory and run "sudo chmod +x" on it.
# Use like so:
#   addhash somefile.txt
# results in file being renamed to:
#   somefile.9g2lap4.txt

for name in "$@"
do
        sum=$(echo $name | md5sum | cut -c1-8)
        withHash="mv $name ${name%.*}.$sum"
        extension="${name##*.}"

        if [ ! -z "$extension" ] && [ ! "$extension" == "$name" ]; then
                withHash=$withHash.$extension
        fi

        $withHash

done