renfilehash.sh

#!/bin/bash
IFS=$(echo "")

if [ ! -f "${1}" ]; then
    echo "File not found!"
    exit 1
fi
filename=$1
fullpath=$(readlink -f $filename)
onlydir=$(dirname $fullpath)
filename=$(basename $filename)
extension=${filename##*.}
filename=${filename%.*}

unset $IFS
echo "Processing $filename.$extension"
newname=$(sha256sum "$fullpath"|cut -d " " -f 1)
echo "Renaming $filename.$extension -> $newname.$extension"
mv -n "$fullpath" "$onlydir"/"$newname".$extension
echo "Done"