RHEL BasedRocky Linux

How To Install CodeIgniter on Rocky Linux 9

Install CodeIgniter on Rocky Linux 9

In this tutorial, we will show you how to install CodeIgniter on Rocky Linux 9. For those of you who didn’t know, CodeIgniter, a powerful PHP framework, provides developers with a robust platform for building dynamic and feature-rich web applications. When paired with the stability and security of Rocky Linux 9, a leading enterprise-level operating system, you can create cutting-edge web projects.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the CodeIgniter on Rocky Linux 9 or RHEL-based.


  • A server running one of the following operating systems: Rocky Linux 9.
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • SSH access to the server (or just open Terminal if you’re on a desktop).
  • An active internet connection. You’ll need an internet connection to download the necessary packages and dependencies for CodeIgniter.
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install CodeIgniter on Rocky Linux 9

Step 1. The first step is to update your system to the latest version of the package list. To do so, run the following commands:

sudo dnf update

Step 2. Installing LAMP Stack

The LAMP stack (Linux, Apache, MySQL, PHP) forms the backbone of many web applications. You can follow our guide here.

Step 3. Configure Apache for CodeIgniter.

Setting up virtual hosts for CodeIgniter ensures a clean URL structure and enhances the application’s performance:

cd /etc/httpd/conf.d/
sudo nano codeigniter.conf

Add the Following Configuration:

<VirtualHost *:80>
ServerAdmin webmaster@example.com
DocumentRoot /var/www/html/codeigniter
ServerName your_domain.com

<Directory /var/www/html/codeigniter>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted

ErrorLog /var/log/httpd/codeigniter_error.log
CustomLog /var/log/httpd/codeigniter_access.log combined

Enable the Virtual Host and Restart Apache:

sudo a2ensite codeigniter.conf
sudo systemctl restart httpd

Step 4. Downloading and Installing CodeIgniter.

Now visit the official CodeIgniter website to download the latest version. Alternatively, use wget or curl to download the package directly:

cd /tmp
wget https://codeload.github.com/codeigniter4/framework/legacy.zip/refs/tags/v4.3.6

Extract the downloaded archive and move the files to the web server’s root directory:

unzip codeigniter4-framework-v4.3.6-0-ge392123.zip
sudo mv ccodeigniter4-framework-v4.3.6-0-ge392123 /var/www/html/codeigniter

Ensure the correct permissions and ownership for CodeIgniter files and directories:

sudo chown -R apache:apache /var/www/html/codeigniter
sudo chmod -R 755 /var/www/html/codeigniter

Step 5. Verifying the Installation

Let’s validate the successful installation of CodeIgniter on Rocky Linux 9:

cd /var/www/html/codeigniter/application/controllers
sudo nano Welcome.php

Add the following code to the file:

defined('BASEPATH') OR exit('No direct script access allowed');

class Welcome extends CI_Controller {
public function index() {

Create a Sample View:

cd /var/www/html/codeigniter/application/views
sudo nano welcome_message.php

Add the following HTML to the file:

<!DOCTYPE html>
<title>Welcome to CodeIgniter Idroot.Us</title>
<h1>Hello, CodeIgniter!</h1>

Save the file, then open your web browser and enter your server’s IP address or domain name in the address bar. You should see the welcome message, confirming that CodeIgniter is successfully installed.

Congratulations! You have successfully installed CodeIgniter. Thanks for using this tutorial for installing the CodeIgniter PHP framework on your Rocky Linux 9 system. For additional help or useful information, we recommend you check the official CodeIgniter website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to idroot.us, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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