Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
One of the major differences between various Linux distributions is package management. Many times, this is the reason somebody steers away from one distribution to another, because he/she doesn't like the way software is installed or because there is software needed that isn't available in the distro's repositories. If you are a beginner in the Linux world and are wondering about the differences between distributions, this will be a good start. If you've only used one or two distributions for some time and you want to see what's on the other side of the fence, this article also might be for you.
The apt family
Comparison of major Linux package management systemsActually, apt should be capitalized, since it's an acronym that stands for Advanced Packaging Tool, but since the actual utilities are lowercase-only, we will refer to them like that. The apt family is a frontend to dpkg in the Debian family of Linux operating systems, and also used in some OpenSolaris offshoots. Some of these applications are apt-get, apt-cache, apt-cdrom or apt-file.