One of the great things about using open source software is the frequency with which bugs are fixed, security holes are patched, and new features are added. Ubuntu includes a very convenient update manager, which checks the software repositories for updates, and alerts you to install any new versions found.
However, if you are annoyed at constantly upgrading, you can follow this guide to tweak the settings of the manager: Navigate to the Software Sources control panel. Under your “System” menu, select “Administration”, and select “Software Sources.” You will be prompted for your root password; once the window opens, select the “Updates” tab:
