homelab/docs/Upgrade from Debian 11 (Bullseye) to 12 (Bookworm).md

1. Update existing packages. Run sudo apt-get update && sudo apt-get upgrade to fetch and install the latest versions of existing packages from the Debian 11 release channel.
2. Reboot the system. Follow the appropriate shutdown procedure for the host.
3. Edit the sources.list file to point to the new release channels. Run sudo nano /etc/apt/sources.list, then replace the release channel names for bullseye with those for bookworm.
4. Update and upgrade packages minimally. Run sudo apt update && sudo apt upgrade --without-new-pkgs.
5. Fully upgrade the system. Run sudo apt full-upgrade.
6. Validate the SSHD config file. Run sudo sshd -t.

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