Another era has come again, when our Debian 10 (Buster) server has also run out of time, and it has become a burning task to do something about this problem. In this tutorial, we will upgrade a perfect Debian 10 (Buster) server to Debian 11 (Bullseye). On this page, we review the necessary tasks before the update, which we use to prepare our system for the new main version.

The operating system running on our Debian-based web servers will become obsolete over time, so over time it will be necessary to completely upgrade the distribution. In this description, we will perform a complete upgrade of a Debian 9 (Stretch) web server to Debian 10 (Buster). There are many features on the server that will also be updated. On the first page of this description, we will perform the pre-upgrade steps to prepare your system for a secure upgrade.

There have been several base system updates for Drupal 9 CMS in recent weeks, so it's worth reviewing its update mechanism as before for the Drupal 8 update. In this description, I'm going to update the Drupal 10 website installed on the Debian 9 (Buster) perfect server from 9.1.2 to 9.1.4, so here we now jump to several versions at once. There are two ways to do this: first with a composer, and then look at the manual update.

On December 2019, 4, Drupal released its currently latest base system, 8.8.0. We’ve talked about how to easily upgrade the Drupal base system before, but more has changed in this release, so we need to get a little deeper into things. So in this description we will look at how to upgrade our Drupal base system from 8.7.10 to 8.8.0.

Debian has introduced a new network interface naming scheme since Release 9 (Stretch). Instead of the usual Ethernet device names (eg eth0) or WLAN device names (eg wlan0), etc. - a newly installed Debian 9 Stretch system - uses names such as enp5s7 and wlp2s0, respectively. Debian 9 (Stretch) still handles these names, but Debian 10 (Buster) no longer. In this description, we will make the transition to using the new network interface names so that if you want to further upgrade your system, your network will work with Debian 10.

In this tutorial, I am upgrading a Debian 8 (Jessie) laptop for desktop use to Debian 9 (Stretch). Your computer has the LXDE desktop environment and some basic programs installed, so you can upgrade them to the newer Debian mainstream without any problems.