Scenario: I have a directory full of code files (in this case, 51 of them) that each need a find-and-replace executed; however, it is adding a line to part of the code, so replace one line with several. This means that SED cannot do the trick; you’ll get errors like, > > > sed: -e expression #1, char 49: unterminated `s' command Rather than spending the time figuring out how to encode things for SED, the simplest solution was just to use emacs inimitable dired.