== versions == (Versioning taken from Wikipedia.com)
4.10 Warty Warthog
5.04 Hoary Hedgehog
5.10 Breezy Badger
6.06 Dapper Drake (LTS)
6.10 Edgy Eft
7.04 Feisty Fawn
7.10 Gutsy Gibbon
8.04 Hardy Heron (LTS)
8.10 Intrepid Ibex
9.04 Jaunty Jackalope
9.10 Karmic Koala
10.04 Lucid Lynx (LTS)
10.10 Maverick Meerkat
11.04 Natty Narwhal
11.10 Oneiric Ocelot
12.04 Precise Pangolin
12.10 Quantal Quetzal
== getting a list of all installed packages ==
dpkg --get-selections
== searching for a package on command line ==
apt-cache search <string>