Foreword#
This guide is again very brief. The only important thing is that you create a backup of your installation before performing the upgrade. Debian is very robust, and I had no problems with 15 servers, but it’s better to be safe than sorry.
Updating#
Before you can upgrade to Debian 13, the system must be up to date. Simply enter these commands:
sudo apt update
sudo apt upgrade
sudo apt full-upgrade
The system should then be restarted.
sudo reboot
Upgrade to Debian 13#
To update Debian, you must first tell Debian to use the new repositories. Debian 12 is called “Bookworm” and Debian 13 is called “Trixie.”
This setting must be adjusted in this file. To do this, simply copy the command into the terminal again.
sudo nano /etc/apt/sources.list
Here, you must rename everything related to “Bookworm” to „Trixie”. I am referring specifically to these three things:
Bookworm → Trixie
Bookworm updates → Trixie updates
Bookworm security → Trixie security
Once that is done, we need to enter three more commands into the terminal:
To update the repository.
sudo apt update
This prepares the system for the upgrade. Press “Q” when prompted:
sudo apt upgrade --without-new-pkgs
Now perform the full upgrade to Debian 13 with the following command:
sudo apt full-upgrade
This will install new packages, update existing ones, and remove outdated dependencies. Once the update is complete, restart the system with the following command:
sudo reboot
After restarting, run the following to check that the upgrade was performed correctly:
lsb_release -a
If you now see “Debian 13”, your system has been successfully updated.
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