CloudLinux OS is designed for shared hosting providers. It isolates each customer into a separate “Lightweight Virtualized Environment” (LVE), which partitions, allocates, and limits server resources, like memory, CPU, and connections, for each tenant. This ensures that tenants cannot jeopardize the stability of your servers, causing all sites to slow down or even come to a halt. CloudLinux OS also “cages” tenants from one another to avoid security breaches. This way, unstable scripts or malware are not able to sprawl across your customer sites, causing severe harm.

About Stability Features

Stability is the key to success in shared hosting – stable servers make both you and your customers happy. Stable servers reduce churn and allow you to increase density, and therefore magnify your profit. The CloudLinux OS stability features prevent resource spikes and make your servers rock-solid stable, even in the most stressful situations.

The CloudLinux OS Lightweight Virtualized Environment is a kernel-level technology that isolates each tenant into their own environment and provides them with the amount of resources (CPU, IO, memory, processes, etc.) that can be used – specific to each individual customer. If the tenant hits the limit, other users will not notice anything, because the offender is immediately throttled. This eliminates resource spikes, server overloads, and angry phone calls from customers.

About Security Features

Cleaning up a hacked server is a nightmare. Yet, defacement and hacked accounts is something hosters battle on a daily basis. Beyond taking your support team's time, it also tarnishes your company image and causes customers to leave in droves. The main reason hacking is so easy on shared hosting servers is because Linux was never meant to be used by a large number of not vetted users. It is too easy for a hacker to obtain an account on your server (by using a stolen credit card and signing up or by abusing some outdated script one of your customers has not updated for years). After that, a hacker has inside access to the server and can begin poking around, finding low hanging fruit and hacking your server.

CloudLinux OS stops that. With our CageFS and SecureLinks technologies, users are virtualized to their own file systems, preventing any individual user from seeing any other users on the server.

About Profitability Features

The high level of stability, which CloudLinux OS provides, makes every server more efficient, and that allows you to multiply the number of customers on each server without any stress. By preventing resource spikes, you can drastically improve utilization of your servers. Before CloudLinux OS, you couldn't utilize 20–30 % of your server without affecting stability, but now you can have up to 80 % of your server utilized at any given time. Profitability is also increased by the high level of security CloudLinux OS provides. Highly secure servers allow your customers to enjoy safe shared hosting, which decreases support inquires.

By setting resource limits for each customer, you also create upsell opportunities whenever a user hits their limit. When a user hits the limit, you can upsell them to higher level or better plan without moving them to another server. Furthermore, by creating hosting packages based on resource utilization and flexibility features, like support of various PHP versions, you could completely change your pricing policy and save old customers while attracting new ones. As a result of this expanded offering, you could increase profits.

About Performance Features

CloudLinux OS offers a set of powerful features that greatly optimize performance of your servers. For example, mod_lsapi is faster than any other way to serve PHP with Apache.