How to Install Redis on Linux: Step-by-Step Guide

To install Redis on Linux, use your system's package manager like apt for Ubuntu or yum for CentOS. Run sudo apt update then sudo apt install redis-server on Ubuntu, or sudo yum install redis on CentOS, then start the Redis service.

Syntax

Use your Linux distribution's package manager to install Redis. The commands below show the general syntax:

• Ubuntu/Debian: sudo apt update updates package lists, then sudo apt install redis-server installs Redis.
• CentOS/RHEL: sudo yum install redis installs Redis directly.
• After installation, start Redis with sudo systemctl start redis and enable it to run on boot with sudo systemctl enable redis.

bash

sudo apt update
sudo apt install redis-server
sudo systemctl start redis
sudo systemctl enable redis

Example

This example shows how to install Redis on Ubuntu, start the service, and check its status.

bash

sudo apt update
sudo apt install -y redis-server
sudo systemctl start redis
sudo systemctl enable redis
sudo systemctl status redis

Output

● redis.service - Advanced key-value store
   Loaded: loaded (/lib/systemd/system/redis.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2024-06-20 10:00:00 UTC; 10s ago
 Main PID: 1234 (redis-server)
    Tasks: 4 (limit: 4915)
   Memory: 1.5M
   CGroup: /system.slice/redis.service
           └─1234 /usr/bin/redis-server 127.0.0.1:6379

Common Pitfalls

Common mistakes when installing Redis on Linux include:

• Not updating package lists before installation, causing outdated versions.
• Forgetting to start or enable the Redis service, so Redis won't run automatically.
• Using incorrect package names depending on the Linux distribution.
• Not checking firewall settings that may block Redis default port 6379.

bash

sudo apt install redis-server
sudo systemctl start redis
# Wrong: missing 'sudo apt update' may install old version

# Correct way:
sudo apt update
sudo apt install redis-server
sudo systemctl start redis
sudo systemctl enable redis

Quick Reference

Command	Description
sudo apt update	Refresh package lists on Ubuntu/Debian
sudo apt install redis-server	Install Redis on Ubuntu/Debian
sudo yum install redis	Install Redis on CentOS/RHEL
sudo systemctl start redis	Start Redis service
sudo systemctl enable redis	Enable Redis to start on boot
sudo systemctl status redis	Check Redis service status

Key Takeaways

Always update your package list before installing Redis to get the latest version.

Use the correct package manager commands for your Linux distribution.

Start and enable the Redis service to ensure it runs properly.

Check Redis service status to confirm successful installation.

Be aware of firewall settings that might block Redis connections.