I have an ispconfig 3.1 running on: Debian 9 Mysql 5.6 Mysql 7 php 7.1 With DNS/Mail/Mysql/Hosting functions from ispconfig. I am wondering if there is a way to upgrade everything to the latest level, e.g ispconfig 3.2.12p debian 12.6 mysql 8 php 8.3 php 7.1 (existing software requires 7.x) Thanks!
You can not update the operating system in place without interruption. What you can do, though, is get a new server with Debian 12 and ISPConfig installed, migrate over the old setup, e.g., by using the ISPConfig Migration Tool, then switch over DNS for the domain, and finally, switch off the old system.
