Earlier today someone in IRC chat room pointed out me an easter egg (hidden feature or message in a game or software or sound track) for Ubuntu Linux.
apt-get command easter egg
Open your terminal and type the command:
(__) (oo) /------\/ / | || * /\---/\ ~~ ~~ ...."Have you mooed today?"...
aptitude command easter egg
Also try out following at a shell prompt:
aptitude -v moo
There really are no Easter Eggs in this program.
Now try one more time:
aptitude -vv moo
Didn't I already tell you that there are no Easter Eggs in this program?
Heh, keep adding more v options to a command:
aptitude -vvv moo
aptitude -vvvvv moo
I'm sure there are more easter eggs. I'd love to read about more hidden features in the comments section below.