Managing Debian Packages
The original Debian package management tool is dpkg, which operates directly on .deb package files and can be used to automate the installation and maintenance of software packages. The alternative apt-get tool operates using package names, obtaining them from a predefined source (such as CD-ROMs, FTP sites, etc.). Both tools work from the command line.
The dselect command offers an interactive menu that allows the administrator to select from a list of available packages and mark them for subsequent installation. The alien command allows the use of non-Debian packages, such as the Red Hat RPM format.
For complete information on Debian package management commands, see details in their respective manpages.