How to Install Redis on CentOS Stream 9: A Step-by-Step Tutorial

Redis is a high-performance, open-source, in-memory data store known for its speed and versatility. It’s widely used for caching, session management, real-time analytics, and more. If you’re working with CentOS Stream 9 and want to harness the power of Redis, this step-by-step tutorial will guide you through the installation process.

Prerequisites

Before you begin, make sure you have the following:

1. A CentOS Stream 9 server with root or sudo access.
2. An SSH client for connecting to your server.
3. Basic familiarity with Linux command-line operations.

Step 1: Update the System

Ensure your system is up to date by running the following commands to update your package repository and installed packages:

sudo dnf -y update

This command will refresh your system’s package list and install any available updates.

Step 2: Enable the EPEL Repository

Redis can be installed via the Extra Packages for Enterprise Linux (EPEL) repository, which provides additional software packages not included in the default CentOS repositories. To enable EPEL, use the following command:

sudo dnf -y install epel-release

Step 3: Install Redis

With the EPEL repository enabled, proceed to install Redis by running the following command:

sudo dnf -y install redis

This command will download and install Redis along with its dependencies.

Step 4: Start and Enable Redis

To ensure that Redis starts automatically when your server boots up and is currently running, enable and start the Redis service with the following commands:

sudo systemctl start redis
sudo systemctl enable redis

To check the status of the Redis service, use:

sudo systemctl status redis

If Redis is functioning without issues, you should see “active (running)” in the output.

Step 5: Configure Redis (Optional)

By default, Redis is configured to accept connections only from localhost. If you want to access Redis from remote servers or modify other configuration settings, you can edit the Redis configuration file. The configuration file is located at /etc/redis.conf.

Use your preferred text editor, such as Nano or Vim, to edit the configuration file:

sudo nano /etc/redis.conf

Make the necessary changes, save the file, and then restart the Redis service for the changes to take effect:

sudo systemctl restart redis

Step 6: Testing Redis

To test if Redis is working correctly, use the redis-cli tool to connect to the Redis server:

redis-cli

You should see a Redis prompt. From here, you can start executing Redis commands and interacting with the server. For example, you can set a key-value pair:

set mykey "Hello, Redis!"

To retrieve the value, use:

get mykey

If everything is set up correctly, you will see “Hello, Redis!” as the output.

Conclusion

You’ve successfully installed Redis on your CentOS Stream 9 server, and you’re now ready to leverage this high-performance data store for various applications. Redis offers a wide range of use cases, including caching, real-time analytics, and more. To make the most of this powerful tool, consider securing your Redis server and configuring it according to your specific requirements. Enjoy using Redis on CentOS Stream 9!