Things You Need To Know To Become An Apt Guru - Make Tech Easier
http://maketecheasier.com/become-an-apt-guru/2009/02/24

This site helps you with things you need to know to become an Apt Guru.

Quite possibly the most distinguishing feature of Debian-based Linux distributions (such as Ubuntu, Mepis, Knoppix, etc) is their package system - APT. Also

1.1. How can I add a package? That's easy! Just use: apt-get install package 1.2. How can I upgrade my installation to the latest version? That's easy! Just use: apt-get dist-upgrade 1.3. How can I search for a package? That's easy! Just use: apt-cache search keyword Why not apt-get search keyword? Shut up, be happy. That's just how it is.

The annoyances of the Debian's package management..I've come across some of these before, but I still prefer Debian over alternatives..