[einhverfr]

I came across something in fortune some time ago which you can find at:

http://motd.ambians.com/quotes.php/name/linux_songs_poems/to...

I have found it to be surprisingly useful. Nobody uses all the commands but remembering that something like zcat exists can be extremely useful. Also remembering to pipe through sort before sending through uniq is helpful as well.

[gav]

In most cases you can replace "sort | uniq" with "sort -u".