Question

I need a linux bash script to loop a folder for all files and check if there is a string in them, change another string of them. For example we check if file contanis AAAA then replace BBBB with CCCC and if didn’t have AAAA we change DDDD to EEEE.

I wrote some codes but I’m not sure if they work correctly:

#!/bin/bash

PATH = /path/to/files/* # files has no extension

for file in $PATH; do
    if grep -q "AAAA" $file; then
        replace "BBBB" "CCCC" -- $file
    else
        replace "DDDD" "EEEE" -- $file
    fi
done

Answer 1

A one-liner doing your job :

for i in /path/to/files/* ; do if grep -q AAAA "$i" ; then sed -i 's/BBBB/CCCC/g' "$i" ; else sed -i 's/DDDD/EEEE/g' "$i" ; fi ; done