Hello According to centos7 expiration time Does ispconfig have a program to replace it? Will it support Alma Linux or Rocky Linux?
EL8 (RHEL, CentOS, incl. Stream, Alma and Rocky Linux) are supported by ISPConfig. Enterprise Linux 9 support can be considered experimental. ISPConfig should work on EL9 systems, but there could be still undiscovered bugs lingering around and don't expect a how-to so soon for it. If you decide to use for example Alma or Rocky Linux 9 then you can use the CentOS 8 Howto as the base and then work your way through the steps. Here and there might be differences which you'll have to figure yourself out, if you should run in any though.