APT is an advanced interface to the Debian packaging system. It features
complete installation ordering, multiple source capability and several other
unique features, see the User's Guide in
/usr/share/doc/apt-doc/guide.html/index.html (you will have to
install the apt-doc package).
aptitude is the recommended package manager for Debian GNU/Linux
systems. It is a text-based interface to APT using the curses library, and can
be used to perform management tasks in a fast and easy way.
Before you can use
aptitude, you'll have to edit the
/etc/apt/sources.list file to set it up. If you wish to upgrade
to the latest stable version of Debian, you'll probably want to use a source
like this one:
https://http.us.debian.org/debian stable main contrib non-free
You can replace http.us.debian.org with the name of a faster Debian mirror near
you. See the mirror list at
for more information.
More details on this can be found in the
To update your system, run
Answer any questions that might come up, and your system will be upgraded. See
aptitude, Section 7.1.3.