5.3 Upgrading

After properly setting up /etc/apt/sources.list and /etc/apt/preferences as described above you can begin the upgrade.

Note that tracking the testing distribution of Debian can have the side effect of delaying the installation of packages containing security fixes, since such packages are uploaded to unstable and only later migrate to testing.

See Debian package management, Chapter 6 for the basics, and see APT upgrade troubleshooting, Section 6.3.2 if you encounter problems.