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.

By making the web and other services running on our server available to the public, there may be a need for a comprehensive monitoring system that allows us to track information about the utilization of various resources on our server from one place. Many of these softwares are available today, and in this tutorial we will look at the installation and commissioning of a server monitor package called Munin on Debian 9 (Stretch) and Debian 10 (Buster).