Using Ubuntu Linux/Software

There are lots of software packages inside the Ubuntu repositories; they are divided into categories as follows:
 * Main: supported, free
 * Restricted: supported, non-free
 * Universe: unsupported, free
 * Multiverse: unsupported, non-free

You may also add 3rd-party repositories.

To install/remove software packages:
 * 1) Click System -> Administration -> Ubuntu Software Centre (enter your password as needed)
 * 2) Mark the things you want to install/remove/upgrade/...
 * 3) Click apply

If you are using Ubuntu 11.04 or newer, your Ubuntu Software Centre is found in the applications directory.

To install 3rd-party software packages:
 * 1) Double-click on the downloaded .deb files
 * 2) Click install