Originally Posted by Thor_2.0
Well, this is easy, and (welcome to Linux) the better way to manage software. Ubuntu and Debian, eh? Well, use apt-get
Well, on Debian based distros it would rather be apt-cache. Use the policy
option to get information about available and installed versions and the show
option to get a description of a package.
apt-cache show vim
apt-cache policy iceweasel
The apt-cache command is also able to show dependencies, reverse dependencies and so on. For more information on the usage of apt-cache just have a look at