How to grep and replace

Question

I need to recursively search for a specified string within all files and subdirectories within a directory and replace this string with another string.

I know that t

Answer 1

This works best for me on OS X:

grep -r -l 'searchtext' . | sort | uniq | xargs perl -e "s/matchtext/replacetext/" -pi

Source: http://www.praj.com.au/post/23691181208/grep-replace-text-string-in-files