Un poco de humor geek:
(% represents the csh, $ represents the bourne shell)
% «How poorly would you rate the UNIX (so-called) user interface?
% rm congressional-ethics
rm: congressional-ethics nonexistent
% ar m God
ar: God does not exist
% [Where is Jimmy Hoffa?
% ^How did the sex change^ operation go?
% If I had a ( for every $ Congress spent, what would I have?
Too many (‘s.
Make: Don’t know how to make love. Stop.
% sleep with me
% got a light?
% man: why did you get a divorce?
man:: Too many arguments.
% ^What is saccharine?
(-: Command not found.
$ PATH=pretending! /usr/ucb/which sense
no sense in pretending
bottle: cannot open
opener: not found
$ mkdir matter; cat >matter
matter: cannot create
Or, in a System V (att) universe:
$ cat «can of food»
cat: cannot open can of food