In the process of a major system upgrade from Debian 11 to 12, after the preparations, we have reached the most critical stage: performing a full distribution upgrade (dist-upgrade). On this page, we will start the process by switching to the Konsole terminal and go through all the configuration file conflicts in detail. We will pay special attention to the services that are vital for ISPConfig servers (MariaDB, Pure-FTPd, Dovecot, Apache), showing in which cases we should stick to our own settings to maintain functionality, and when we can safely accept new versions (e.g. Jailkit, Roundcube, GRUB). At the end of the steps, we will close the stage with a successful reboot, entering the world of Debian 12.

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 services on the server that will also be updated. On the second page of the description, we will perform a full system upgrade after the Distribution is updated with a major version.

In this tutorial, we build the perfect Debian 10 (Buster) server version 1.0, which we build on the previous Debian 10 (Buster) LAMP server. This page installs the following components: FTP server, Quota, BIND DNS server, web statistics, Jailkit, Fail2Ban and UFW firewall.

On the third page of this tutorial, we continue to build the perfect 9 version of Debian 1.0 (Stretch) by installing the following components: Quota quota system, BIND DNS server, Webalizer, AWstats web statistics, Jailkit, Fail2Ban and UFW firewall

In this tutorial, we will continue to install the Debian 8 Perfect Server 1.0 with the following main components: Quota, BIND DNS Server, Vlogger, Webalizer, AWStats, Jailkit and Fail2 (page 3 of the Description)