How To Upgrade Debian 10 Buster To Debian 11 Bullseye

Upgrade Debian 10 Buster To Debian 11 Bullseye

In this tutorial, we will show you how to upgrade Debian 10 Buster To Debian 11 Bullseye. For those of you who didn’t know, Debian 11 “Bullseye” features the latest Debian technology for desktops, servers, and all of its flavors. The new version offers updated packages and five years of support. The new Debian 11 distribution ships with many different desktop environments (DE) and several updated applications.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step upgrade from Debian 10 to Debian 11.

Upgrade Debian 10 Buster To Debian 11 Bullseye

Step 1. Before running the tutorial below, it’s important to make sure your system is up to date by running the following apt commands in the terminal:

sudo apt update
sudo apt upgrade
sudo apt install gcc-8-base

Step 2. Upgrade to Debian 11 (Bullseye).

Let us check the currently installed Debian version using the command:

[[email protected] ~]# cat /etc/debian_version 
10.10

You can also use lsb_release command to display the Debian version:

lsb_release -a

Next, we edit the source list file of Debian 10 and will replace the existing repository addresses with Debian 11:

sudo nano /etc/apt/sources.list

Now you need to comment out all the existing entries for Debian Buster, and this is done by adding(#)at the start of each line like the example below:

#deb http://deb.debian.org/debian/ buster main 
#deb-src http://deb.debian.org/debian/ buster main  

#deb http://security.debian.org/debian-security bullseye/updates  main  
#deb-src http://security.debian.org/debian-security bullseye/updates main

Now, at the end of the file, copy-paste the following URLs list:

deb http://deb.debian.org/debian/ bullseye main contrib non-free
deb-src http://deb.debian.org/debian/ bullseye-updates main contrib non-free

deb http://security.debian.org/debian-security bullseye-security main
deb-src http://security.debian.org/debian-security bullseye-security main
deb http://ftp.debian.org/debian bullseye-backports main contrib non-free

Upgrade Debian 10 Buster To Debian 11 Bullseye

Update the system repository list once to verify the addition of the repositories:

sudo apt update
sudo apt full-upgrade

Once the Debian 11 upgrade process is completed, reboot your system:

reboot

Now that the upgrade process is complete, you can verify the version using the below command:

[[email protected] ~]# cat /etc/debian_version 
11.0

Congratulations! You have successfully upgrade Debian. Thanks for using this tutorial for an upgrade Debian 10 to Debian 11 system. For additional help or useful information, we recommend you to check the official Debian website.

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