List files with certain extensions with ls and grep

Use regular expressions with find:

find . -iregex '.*\.\(mp3\|mp4\|exe\)' -printf '%f\n'

If you're piping the filenames:

find . -iregex '.*\.\(mp3\|mp4\|exe\)' -printf '%f\0' | xargs -0 dosomething

This protects filenames that contain spaces or newlines.

OS X find only supports alternation when the -E (enhanced) option is used.

find -E . -regex '.*\.(mp3|mp4|exe)'

Why not:

ls *.{mp3,exe,mp4}

I'm not sure where I learned it - but I've been using this.

egrep -- extended grep -- will help here

ls | egrep '\.mp4$|\.mp3$|\.exe$'

should do the job.

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