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CloudLinux OS

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CloudLinux - the Ultimate Super Tool for Hosting

CloudLinux - the Ultimate Super Tool for Hosting

Zipa Hosting provides CloudLinux OS for free with all shared hosting, reseller hosting and select hosted email services. CloudLinux prevents a single tenant from using up all the resources by isolating it into a virtualized environment. With Linux, if a website receives extreme traffic, all websites on the server will be slow or down. With CloudLinux, all websites on the server will be normal and only the website receiving the extreme traffic will be slow or down. In addition to security benefits, this is the single most important benefit of CloudLinux.


CLOUDLINUX FEATURES


CloudLinux is designed from the ground up to secure and control individual tenants in shared hosting environments. CloudLinux stops intruders, prevents various attacks and increases server performance. Linux was never meant to be used by a large number of unvetted users. It is too easy for a hacker to obtain an account by signing up or by abusing some script, gain inside access to the server and begin poking around. CloudLinux stops that.

While a normal Linux server may go offline due to sudden spikes caused by a single tenant, CloudLinux stays stable by isolating the impact to the offending tenant. It creates a Lightweight Virtualized Environment (LVE) with CageFS for each tenant and "cages" them, separating from issues caused by others. Any error or failure specific to a single tenant will only affect that tenant and others will not experience any of it. All tenants on the server are isolated from each other so if one goes down everyone else is still stable and safe.

CageFS Virtualized File System
CageFS Virtualized File System

CageFS is a virtualized, per-user file system that encapsulates each user, isolates them in "cages" to increase security. It prevents them from seeing each other and stops most information disclosure attacks and privilege escalation attacks.

KernelCare Rebootless Security Update
KernelCare Rebootless Security Update

KernelCare keeps server kernels up to date with live, automated security updates without requiring any reboot. It installs patches to the running server without any impact on performance. This eliminates downtimes related to kernel updates.

Lightweight Virtual Environment (LVE)
Lightweight Virtual Environment (LVE)

The Lightweight Virtualized Environment (LVE) shields the server from performance spikes, slowdowns and downtimes by isolating each tenant into their own environment. This makes it rock-solid stable, even in the most stressful situations.

Prevent Attacks Using SecureLinks
Prevent Attacks Using SecureLinks

SecureLinks is a kernel-level technology that prevents intruders from creating symlinks and hardlinks to files that they don’t own and prevents all known symbolic link attacks, which further enhances server security.

Lighting Fast PHP Using Mod_lsapi
Lighting Fast PHP Using Mod_lsapi

Mod_lsapi is the fastest and most reliable way to serve PHP pages, keeping servers lightning-fast. It is a drop-in replacement for SuPHP, FCGID, RUID2, and ITK. It has a low memory footprint and doesn't suffer from stability issues.

PHP Selector & MySQL Governor
PHP Selector & MySQL Governor

The PHP Selector allows end users to select the specific version of PHP they need. MySQL Governor monitors MySQL usage, prevents overloads and improves overall stability and keeps the server high-performing all the time.

Frequently Asked Questions

Cloudlinux is a Linux distributive, especially designed for shared/reseller hosting with aim to improve stability.
On a hosting server all users share access to server resources as RAM, CPUs, hard disks.

So one user with unoptimized scripts or heavy sites can grab most of resources, thus causing poor server performance for all other sites on the server.

Cloudlinux OS is designed especially for servers being used in this way, and it makes impossible situation when one or several users severely load or even hung up the server.

Cloudlinux uses LVE technology that creates so called container (separated operating environment) for each user on server thus limiting amount of resources one account can use. So in some aspects, it is similar to OpenVZ or other OS-based virtualzation technologies.

If your website exceeds resource limits, the website will be slowed down temporarily. This is done to ensure that high resource usage of your website is not causing issues to websites of other customers. With CloudLinux, all other websites hosted in the server will continue to work at normal speed even when your website is hitting limits.

We would like to clarify that limits imposed by CloudLinux should not be confused with disk usage limits or bandwidth of your cpanel accounts.

CloudLinux limits the share of processing power of CPU in server by your website mainly. As you may know CPU is the brain of server and number of calculations & processes a CPU can complete in a second is limited. CPU power is the one of the critical resources in server.

CloudLinux also limits RAM, another critical resource in server. RAM is the memory of brain, if you call CPU the brain.

A website need not be very busy or even live to become a resource hog. As we explained before, a badly coded website or website with third party plugins/theme can hit limits. If you see such an issue, please contact an experienced web developer to find out why your website is hitting limits.

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