CloudLinux OS VDS Setup 2026 | SistemDC

CloudLinux OS provides resource isolation (LVE), CageFS security and a PHP selector for shared hosting environments.

What Is CloudLinux OS and What Does It Do?

CloudLinux applies CPU/RAM/IO limits to each user through a kernel module based on RHEL/AlmaLinux. CageFS keeps every account in an isolated view of the file system. With PHP Selector the PHP version is chosen per site.

Benefits

Prevents noisy neighbours, stable hosting performance, Imunify360/KernelCare integration, native cPanel support.

Who Should Choose It?

Shared/reseller hosting providers and multi-tenant servers.

How Is It Installed?

1. Order an AlmaLinux 9 or CloudLinux 9 VDS + cPanel.
2. Assign the CloudLinux license to the IP: cldeploy -i (official script).
3. Define per-package CPU/RAM/IO limits in LVE Manager.
4. Enable CageFS for all users.
5. Activate the supported versions (7.4–8.3) in PHP Selector.

Where It Can and Cannot Be Installed

cPanel/WHM + AlmaLinux/Rocky/CloudLinux. 4 GB+ RAM is recommended (many accounts).

SistemDC Ordering Steps

The SistemDC cPanel CloudLinux VDS plan, or a license upgrade on an existing cPanel server.

Frequently Asked Questions

Is CloudLinux necessary on a single-site VDS?
No; it makes sense with multiple hosting accounts.

What happens when an LVE limit is exceeded?
The site returns 503/508; other tenants are not affected.

Moving from AlmaLinux to CloudLinux?
An in-place conversion is possible with the cldeploy script.