... Installing Ubuntu and Adding Software Time-tested tools for initially installing Ubuntu, and later adding and managing software, include the APT (Advanced Package Tool) and dpkg (Debian ... APT, dpkg, and related command line utilities including aptitude are given later in this chapter. Obtaining and Installing Ubuntu Ubuntu and its close cousins Kubuntu, Xubuntu, and Edubuntu are ... authentication and encryption for software packages, visit the SecureApt section on the Ubuntu help web site ( https://help .ubuntu. com/community/SecureApt ). Chapter 2: Installing Ubuntu and Adding Software...