Im a Debian user andlike manyI use apt and its associated tools. If you havent yet discovered apt heres a brief summary of some of it and some of its tools which can make your package management even more powerful.
Read it here
Ill start with a brief history lesson. The Advanced packaging tool was introduced in 1998 and first included in a Debian release (2.1 or slink) in 1999. There is no single apt application to speak of, instead its a series of tools and functions originally designed as a front-end to dpkg the software at the heart of Debians package management (it now also support RPM backends). There are several front-ends to apt itself including: Synaptic, aptitude and Adept but I want to look specifically at the base command-line toolsnot that theres anything wrong with the front-ends.