namereplace.sh

#!/bin/bash
if [ "$#" != 3 ]; then
    echo "Usage: $0 <from> <to> <file>"
    exit 1
fi

FROM=$1
TO=$2
FILE=$3

dirname=$(dirname "$FILE")
old_filename=$(basename "$FILE")
new_filename=${old_filename//$FROM/$TO}


if [ "$old_filename" != "$new_filename" ]; then
    mv "$dirname/$old_filename" "$dirname/$new_filename"
fi