Convert all file extensions to lower-case

Question

I\'m trying to lower-case all my extensions regardless of what it is. So far, from what I\'ve seen, you have to specify what file extensions you want to convert to lower-cas

Answer 1

If you have mmv (=move multiple files) installed and your filenames contain at most one dot, you can use

mmv -v "*.*" "#1.#l2"

It does not get more than one dot right (since the matching algo for * is not greedy in mmv), however, it handles () and ' correctly. Example:

$ mmv -v "*.*" "#1.#l2"
FOO.BAR.MP3 -> FOO.bar.mp3 : done
foo bar 'baz' (CD 1).MP3 -> foo bar 'baz' (CD 1).mp3 : done

Not perfect, but much easier to use and remember than all the find/exec/sed stuff.