Chapter 5. ROUNDING OUT THE BIRD
Downloading, Installing, and Updating Programs the Easy Way
One of the handiest things about Ubuntu is that it is equipped with a very simple-to-use application installation mechanism. The engine, using the term loosely, behind this is a mechanism called Advanced Package Tool (APT), which allows you to easily download, install, update, and remove software packaged in DEB archives, or packages.
APT is a rather foolproof way of installing programs; nothing will go missing, since it automatically downloads and installs any files that the main application you are installing requires to run. Tracking down such files, called ...