Machete de apt-get

Syntax	Description	Example(s)
apt-get install {package}	Install the new package. If package is installed then try to upgrade to latest version	apt-get install zip apt-get install lsof samba mysql-client
apt-get remove {package}	Remove/Delete an installed package except configuration files	apt-get remove zip
apt-get --purge remove {package}	Remove/Delete everything including configuration files	apt-get --purge remove mysql-server
apt-get update apt-get upgrade	Resynchronize the package index files and Upgrade the Debian Linux system including security update (Internet access required)	apt-get update apt-get upgrade
apt-get update apt-get dist-upgrade	Usually use to upgrade to Debian distribution. For example Woody to Sarge upgrade. 'dist-upgrade' in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a "smart" conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary.	apt-get update apt-get dist-upgrade
apt-cache search aptitude search	Serach for packages	apt-cache search tunnel apt-cache search 'php.*sql'
apt-get -t testing install {package}	To install packages from the testing repository

{package} - Replace with actual package name

fuente: http://www.cyberciti.biz/howto/question/linux/apt-get-cheat-sheet.php

y Más: http://www.linuxhomenetworking.com/forums/showthread.php/18722-Dpkg-and-apt-get-cheat-sheet
Debian package management, distributions and the /etc/apt/sources.list file
Getting information about packages
Debian Linux apt-get package management cheat sheet