I have recently installed Arch Linux and found that I am eating away at a lot of memory relatively quickly. For whatever reason I have already used 17GB in just about 2 weeks. I do not have a great deal of software installed so I am led to believe that all of the old packages are maintained somewhere.
To support this, I have noticed that if I installed a package, remove that package, and then re-install it that pacman merely unpacks and re-installs the software without having to re-download it.
After I installed my base system, before extra software, I used about 2GB or so maybe. I have since only installed Matlab, Skype, Wine, and a few other small programs. Of course I have also installed missing libraries and the like, but not nearly 15GB worth.
Am I completely wrong here or does Arch never delete old packages when downloading/upgrading to new versions?
If so, how do I delete these un-used packages?
Also, when I remove installed packages I use
pacman -R ...