Debian Quick Reference
Footnotes

1

If you track testing or unstable you can remove references to stable from /etc/apt/sources.list and /etc/apt/preferences because testing starts as a copy of stable.

2

The difference between upgrade and dist-upgrade only appears when new versions of packages stand in different dependency relationships from old versions of those packages. See apt-get(8) for details.

aptitude upgrade and aptitude dist-upgrade start aptitude in the commandline mode. You can switch these to full screen mode by pressing e key.

3

Some *config scripts are disappearing in the newer Sarge release and the package configuration functionality is moved to the debconf system.

Debian Quick Reference