CloudLinux 9 + cPanel support

Issue

You have installed CloudLinux 9 and cPanel and experience any issues.

Environment

• CloudLinux 9
• cPanel

Solution

The best and recommended option for administrators looking to configure a server for production use is to re-install the server using AlmaLinux 8 and/or CloudLinux 8 + cPanel as cPanel does not support CloudLinux 9 yet. 

Note:

There is, however, a way to install cPanel on CloudLinux OS 9. Under normal circumstances, when trying to install cPanel, there will be a blocker similar to the following:

E Blocker found: Newer releases of cPanel & WHM are not compatible with your operating system. 
Upgrade your OS, or use the Update Preferences screen to select a Long-Term Support release for use with your OS. 
cPanel & WHM 11.114.0.5 supports AlmaLinux 8/9, CloudLinux® 8, Rocky Linux™ 8/9, Ubuntu 20 only. 
Please see our OS End of Life policy for more information.

This blocker can be bypassed by using the "--experimental-os=almalinux-9.2" tag during the execution of cPanel's installation script:

cd /home && curl -o latest -L https://securedownloads.cpanel.net/latest && sh latest --experimental-os=almalinux-9.2

Note: this parameter is for use only in experimental mode and not recommended for production environments. For more information about this topic, please refer to this resource.

Cause

cPanel is not suitable for production environments on CloudLinux OS 9 at the moment.

Useful links

https://support.cpanel.net/hc/en-us/articles/1500001216582-What-operating-systems-are-supported-by-cPanel-

https://forums.cpanel.net/threads/panel-not-installed-cloudlinux-9.710029/