[rmccue]

> Multi-letter options start with two hyphens, and each such argument must be separated with spaces.

That's something that's always annoyed me about screen; commands such as "wipe" are "screen -wipe"

[lell]

there's "find ./ -type d", also (find directories only.)

[ilikepi]

'find' is an interesting animal: it* really only has a handful of traditional option parameters, and these are of the single-dash-single-letter variety. The single-dash-word parameters are all part of its expression language for selecting filesystem objects.

* checked against /usr/bin/find on OS X 10.6.8 (which seems to lack an option parameter for printing its own version number) and GNU find 4.2.27

[silentbicycle]

'find' is one of the oldest Unix programs still in common use. Its standardized arguments predate modern conventions for command line arguments.