replcae on all files code example
Example 1: linux replace string in all files
sed -i 's/old-text/new-text/g' input.txt
Example 2: How to replace a string in multiple files in linux command line
cd /path/to/your/folder
sed -i 's/foo/bar/g' *
sed -i 's/old-text/new-text/g' input.txt
cd /path/to/your/folder
sed -i 's/foo/bar/g' *