Using Aptitude to list and install backported or unstable packages Early into my linux Debian web server administration, out of necessity and after a lot of trail and error and reading I worked out the right preferences that keeps my systems very stable and yet with the ability to install the occasional backported or unstable package. My package management utility of choice is `aptitude` but these settings will also effectively work for `apt-get` and before I begin do +1 this if you find it useful. The above shows the available version of Django with their respective APT pinning numbers: 990 being the stable version and selected by default when installing, 400 being the backported version, 50 being an unstable version, and 100 pinning for our already installed version. During normal installation the stable default is always selected, however now I also have an option to easily see other available versions by viewing the information provided at bottom of the package detail