Best way to do a find/replace in several files?

Question

what\'s the best way to do this? I\'m no command line warrior, but I was thinking there\'s possibly a way of using grep and cat.

I just want to

Answer 1

An alternative to sed is using rpl (e.g. available from http://rpl.sourceforge.net/ or your GNU/Linux distribution), like rpl --recursive --verbose --whole-words 'F' 'A' grades/