When trying to perform software installation or server updates you may receive an error from Yum with the following:
root@server [~] # yum makecache
Loaded plugins: fastestmirror, rhnplugin, universal-hooks
Error communicating with server. The message was:
Yours `rhn-client-tools` is outdated, please update it using `yum update rhn-client-tools -y`.
This system is not registered with CLN.
You can use rhn_register to register.
CLN support will be disabled.
This error indicates you either do not have a CloudLinux license, or the license has expired, preventing your system from receiving updates from their network. You can check if the license was purchased through cPanel here:
or through CloudLinux here:
If your system is not licensed you'll need to either purchase a license, which can be done through the cPanel Store, or you'll need to uninstall the CloudLinux software.