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Getting Started with CloudLinux: A Setup Guide for Hosting Providers

Running a reliable and secure hosting environment is a top priority for hosting providers, and CloudLinux is one of the most effective tools to help you achieve that. Designed specifically for shared hosting, CloudLinux enhances server performance, security, and stability by isolating users and managing resource usage effectively.

In this guide, we’ll walk you through setting up CloudLinux and dive into its key features, including CageFS, PHP Selector, and MySQL Governor, that make it the go-to operating system for hosting providers.

Why Choose CloudLinux for Your Hosting Environment?

Before we jump into the setup, let’s take a quick look at why CloudLinux is so widely adopted by hosting providers:

  • Enhanced Server Stability: Prevents a single account from consuming excessive resources and causing downtime for other users.
  • Isolated User Accounts: Adds a security layer by isolating accounts, making it harder for attackers to exploit vulnerabilities.
  • Customizable Environment: Allows users to choose PHP versions, modules, and more, ensuring compatibility with a variety of applications.
  • Improved Resource Management: Limits CPU, memory, and disk IO usage per account to optimize server performance.

Step-by-Step Setup Guide for CloudLinux

Step 1: Purchase and Register CloudLinux

  1. Visit the CloudLinux website and purchase a CloudLinux license.
  2. Note your license key, as it will be needed during the installation process.

Step 2: Install CloudLinux on Your Server

  1. Log in to your server as the root user via SSH.
  2. Run the following command to install the CloudLinux conversion script:
    wget https://repo.cloudlinux.com/cloudlinux/sources/cln/cldeploy
    sh cldeploy -k YOUR_LICENSE_KEY
    Replace YOUR_LICENSE_KEY with the license key you received.
  3. Once the installation is complete, reboot the server:
    reboot

Step 3: Verify the Installation

  1. After rebooting, log back into the server via SSH.
  2. Verify that CloudLinux is installed:
    cat /etc/redhat-release
    You should see something like CloudLinux release x.x.x.

Step 4: Install the CloudLinux Components

CloudLinux includes several tools that need to be installed separately, such as CageFS, PHP Selector, and MySQL Governor.

Key CloudLinux Features and How to Configure Them

1. CageFS: User Account Isolation

What is CageFS?

CageFS is a virtualized file system that isolates each user on the server, preventing them from seeing or accessing files outside their own environment.

Why It Matters:

  • Prevents privilege escalation attacks.
  • Blocks users from viewing server configuration files or other users' data.

How to Set Up CageFS:

  1. Install CageFS using the following command:
    yum install cagefs
  2. Enable CageFS:
    cagefsctl --enable
  3. Add all users to CageFS:
    cagefsctl --force-update

Pro Tip: Use the CageFS Management interface in WHM to manage individual users.

2. PHP Selector: Flexible PHP Versions

What is PHP Selector?

PHP Selector allows users to choose the PHP version and extensions they need for their applications.

How to Set Up PHP Selector:

  1. Install the required PHP versions:
    yum groupinstall alt-php
  2. Configure PHP Selector via WHM under CloudLinux Manager > PHP Selector.

3. MySQL Governor: Resource Management for Databases

What is MySQL Governor?

MySQL Governor monitors and limits MySQL resource usage on a per-account basis, preventing a single user from monopolizing database resources.

How to Set Up MySQL Governor:

  1. Install MySQL Governor:
    yum install governor-mysql
  2. Enable it for your database server:
    governor-mysql --install
  3. Monitor resource usage with:
    dbtop

Additional CloudLinux Features to Explore

  • ModSecurity Integration: Add ModSecurity to block malicious traffic and prevent SQL injection or cross-site scripting attacks.
  • KernelCare Integration: Enables live kernel patching without the need to reboot the server.
  • Hardened PHP: Protects older PHP versions by applying security patches.

Tips for Hosting Providers Using CloudLinux

  • Regularly Update CloudLinux Tools: Keep CageFS, PHP Selector, and MySQL Governor up-to-date.
  • Monitor Resource Usage: Use WHM or command-line tools to track user activity and optimize resource limits.
  • Educate Users: Provide documentation or tutorials to help users configure PHP versions and troubleshoot issues.
  • Enable Notifications: Configure alerts for resource overuse to resolve problems quickly.

Conclusion

CloudLinux is a game-changer for hosting providers, offering unparalleled stability, security, and resource management features. By isolating user accounts with CageFS, providing flexible PHP environments with PHP Selector, and managing database resources with MySQL Governor, CloudLinux ensures that your hosting environment remains secure and efficient.

Whether you’re running a small shared hosting server or managing hundreds of accounts, CloudLinux provides the tools you need to deliver a reliable hosting experience to your customers.

Ready to take your hosting to the next level? Start your CloudLinux setup today!

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