Reference

http://www.debian.org/doc/manuals/apt-howto/ The official Debian APT HOWTO manual page.

http://www.apt-get.org/ A list of popular APT repositories.

http://wiki.debian.org/SecureApt Guide to using strong cryptography with your APT sources.

http://www.debian.org/releases/woody/i386/dselect-beginner How to get started using dselect for package management.