When to use cloudlinux os : If you are hosting provider for shared hosting ,its very important to protect secure and stabilize your server . Or if you want to isolate users its the better choice.
Cloudlinux OS provide great Stability featurs like LVE Manage and MySQL Governor , the Lightweight Virtual Environment (LVE) is kernel-level technology that allows you to limit all CPU, IO, memory resources, numbers of processes, and concurrent connections per each user ,also its help the provider to Increase Revenue by offer more resources packages,and also provide Reduce Churn Rate. MySQL Governor monitors MySQL usage and throttles abusers, preventing them from overloading the server, which improves overall stability and performance,its support MySQL 5.1 – 5.6 and MariaDB 5.x and 10.x. CageFS: is one of the important feature that provided by CloudLinux OS, its prevents a large number of attacks, including most privilege escalation and information disclosure attacks ,and preventing any individual user from seeing any other users on the server. PHP Selector: allows end users to select the specific version of PHP they need. It allows ultimate flexibility by offering all popular versions of PHP, thats will keep the old scripts of the clients without force them to move or change their website code.PHP Selector allow customer to choose and configure PHP 4.4, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, and 7.0. Mod_lsapi: faster than any other way to serve PHP with Apache server,and its compatible with MPM Worker and Does not require tuning,and also still support PHP directives in .htaccess files, and fully compatible with PHP Selector. SecureLinks is a kernel-level technology that prevents all known symbolic link (symlink) attacks. It enhances the security level of the servers even further and prevents malicious users from creating symbolic link files