"I think it's referring to apt-get moo: $ apt-get moo (__) (oo) /------\/ / | || * /\---/\ ~~ ~~ ....""Have you mooed today?""... To quote Wikipedia:
aptitude states that, unlike Advanced Packaging Tool, it ""does not have Super Cow Powers"". In apt-get ""super cow powers"" can be found by issuing the command apt-get moo. However, in aptitude issuing moo will give the user a prompt saying there are no easter eggs. However, by issuing aptitude -v moo, then aptitude -vv moo, and so on the user will see a series of statements telling them to go away, some ending with a picture not unlike the original apt-get easter egg. Different versions of the program have different sequences.
And, as wRAR commented, the term “Super Cow Powers” is a direct quote from apt-get --help:
