When I found these funniest Linux/Unix shell commands, I just had to share them. Here are my favourites:
% sleep with me
bad character
% If I had a ( for every $ the Congress spent, what would I have? Too many ('s.
% ^How did the sex change operation go?^ Modifier failed.
% !:say, what is saccharine? Bad substitute.
What’s your favourite?
cat “food in cans”
cat: can’t open
Those are great phrases to put on a t-shirt! 😉

like this one:
Good idea, thanks!
I think I’ll ‘sacrifice’ a t-shirt :). But I wonder how many of those who will read it, will really understand what is all this phrase about?
You use t-shirt like that on events about linux and free software, there are a lot of nerds/geeks that will understand. 🙂
Lol I found those so funny I had to post them on my fourm I hope that you don’t mind http://www.forums4hardware.com/viewtopic.php?f=14&t=103
There very funny
Not at all, Lance.
jizm.
$ man woman
No manual entry for woman