Install Redis Server on Ubuntu

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Redis is an open-source, High-Performance, in-memory key-value store that is widely used for caching and data storage. In this guide, we will walk you through the process of installing Redis Server and the php-redis extension on an Ubuntu system. By the end of this tutorial, you’ll have a fully functional Redis Server and the ability to interact with it using PHP.

Prerequisites:

• A Ubuntu system (tested on Ubuntu 22.04 LTS).
• Access to a terminal with sudo privileges.
• Basic familiarity with the Linux command line.

Step 1 – Update System Packages:
Start by ensuring your system’s package repositories are up-to-date:

sudo apt update
sudo apt upgrade

Step 2 – Install Redis Server:
Install Redis Server from the official Ubuntu repositories:

sudo apt install redis-server

Step 3 – Configure Redis:
The default Redis configuration is usually sufficient for most use cases. However, you can adjust settings in the configuration file located at “/etc/redis/redis.conf”.

Step 4 – Start and Enable Redis Service:
Start the Redis service and enable it to start on boot:

sudo systemctl start redis-server
sudo systemctl enable redis-server

Step 5 – Test Redis Server:
Test if Redis is running by connecting to it using the Redis CLI:

redis-cli

You should see a Redis prompt. You can test basic commands like ‘PING’ and ‘SET key value’.

Step 6 – Install php-redis Extension:
Install the php-redis extension to enable Redis support in PHP:

sudo apt install php-redis

Step 7 – Restart PHP-FPM and Test php-redis:
Restart PHP-FPM to load the new extension:

sudo systemctl restart php-fpm

Create a PHP test file to verify the php-redis extension is working:

echo "<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
echo 'Connection to server successful!';
?>" | sudo tee /var/www/html/redis-test.php

Access the test page by navigating to ‘http://localhost/redis-test.php‘ in your web browser.

Step 8 – Interact with Redis Using PHP:
You can now use the ‘php-redis’ extension in your PHP code to interact with the Redis Server. Examples include caching, session management, and more.

Congratulations! You’ve successfully installed Redis Server and the php-redis extension on your Ubuntu system. Redis provides a powerful and efficient caching and data storage solution, while php-redis allows you to seamlessly integrate Redis functionality into your PHP applications. You’re now equipped to leverage the benefits of Redis in your projects to enhance performance and scalability.

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