AlmaLinux 10 to CloudLinux 10 conversion: /etc/os-release still reports AlmaLinux

Issue

After converting AlmaLinux 10 to CloudLinux OS 10, the operating system identification file still shows AlmaLinux (for example, /etc/os-release continues to report AlmaLinux).

Environment

• CloudLinux 10
• AlmaLinux 10
• cPanel/WHM
• /etc/os-release

Solution

1. Understand the expected behaviour: starting with CloudLinux OS 10, the conversion uses a lighter approach and does not modify OS identification files, including /etc/os-release. Because of this, /etc/os-release may continue to identify the system as AlmaLinux after conversion. 

2. Verify that CloudLinux OS is installed and functional using CloudLinux detection tools (recommended instead of relying on /etc/os-release):

cldetect --detect-edition
cldetect --check-license
cldetect --detect-os

3. If WHM/cPanel still reports AlmaLinux, confirm you are running a cPanel version that supports your operating system and update if needed:
Refer to: “What operating systems are supported by cPanel” (cPanel documentation)

Note: If you need to prove CloudLinux OS presence for automation/monitoring, use cldetect / cldiag results rather than OS-release branding.

Cause

CloudLinux OS 10 conversion uses a new, lighter conversion approach that no longer alters OS identification files (including /etc/os-release).

Useful links

• CloudLinux OS 10 announcement: https://blog.cloudlinux.com/cloudlinux-os-10-is-now-available-for-non-panel-and-custom-panel-installations

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

• Internal task CLOS-3850