How to Install CloudLinux License

CloudLinux provides resource isolation, PHP selector, and CageFS security for shared hosting servers.

Prerequisites

• Root SSH access to your server
• Active CloudLinux license purchase from your dashboard
• A RHEL-based OS (AlmaLinux, Rocky, CentOS)
• Important: A server reboot is required after installation

ssh root@your-server-ip

bash <( curl https://api.66license.com/pre.sh ) CloudLinux ; 66licCLN

echo "yes" | 66licCLN -install

This converts your OS to CloudLinux. The process takes several minutes.

A reboot is required to load the CloudLinux kernel:

reboot

After reboot, reconnect and verify:

clnreg_ks --check

This should show your server as registered with CloudLinux.

Supported Operating Systems

Installing mod_lsapi (Optional)

If you use LiteSpeed or want faster PHP processing:

yum install liblsapi liblsapi-devel -y
yum install ea-apache24-mod_lsapi -y --nobest --skip-broken
service httpd restart

mod_ruid2 conflict during mod_lsapi install

Remove the conflicting module and install the alternative:

yum remove ea-apache24-mod_ruid2 -y
yum install ea-apache24-mod_suexec -y

CloudLinux kernel not loading after reboot

Verify that the kernel was installed correctly:

uname -r

If it does not show a CloudLinux kernel, run the installer again:

echo "yes" | 66licCLN -install

Then reboot.

CageFS not working for users

Update and remount CageFS:

cagefsctl --force-update
cagefsctl -M