Replace String in multiple files using Perl

1. Create a list of files that you want to replace the word in

e.g find . | grep Makefile | grep -v Makefile. > list.txt

This will list all Makefile's and exclude Makefile.am etc

2. create a script replace.sh

#!/bin/bash

while read line

perl -pi -e "s/user1/user2/g" $line

done

3. give executable permissions to the script

chmod +x replace.sh

4. run replace script as

./replace.sh < list.txt

Point Element