How to Install Redis® on Ubuntu 24.04
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Introduction
Redis® (Remote Dictionary Server) is an open-source, in-memory, key-value data store, that works as a database, cache, or message broker. Redis® integrates with modern web applications to improve the application performance and reduce your server load by storing repeated queries such as database queries in memory. This article explains how to install Redis® on Ubuntu 24.04 and access the database to enable integration with other applications on your server.
Prerequisites
Before you begin:
Access the server using SSH as a non-root user with sudo privileges.
Install Redis®
Redis® is available in the default package repositories on Ubuntu 24.04. Follow the steps below to install the latest Redis® package on your server.
Update the server's package index.
console$ sudo apt update
Install Redis®.
console$ sudo apt install redis-server
View the installed Redis® version on your server.
console$ redis-server --version
Output.
Redis server v=7.0.15 sha=00000000:0 malloc=jemalloc-5.3.0 bits=64 build=d81b8ff71cfb150e
Configure Redis®
Redis® listens for connection requests on the default localhost port 6379
on your server. In the following steps, configure Redis® to increase the default database limit and accept connections on your localhost 127.0.0.1
address.
Open the main Redis® configuration file using a text editor such as
nano
.console$ sudo nano /etc/redis/redis.conf
- Find the following
bind
directive and verify that your localhost IPV4127.0.0.1
and IPV6::1
values are available.
inibind 127.0.0.1 -::1
- Find the
port
directive and verify the default Redis® port or modify it to a custom TCP port available on your server.
iniport 6379
- Find the following
daemonize
directive and verify that it's set toyes
to enable the Redis® service on your server.
inidaemonize yes
Save and close the file.
- Find the following
Enable the Redis® server to automatically start at boot time.
console$ sudo systemctl enable redis-server.service
Start the Redis® service.
console$ sudo systemctl start redis
View the Redis® server status and verify it's running.
console$ sudo systemctl status redis
● redis-server.service - Advanced key-value store Loaded: loaded (/usr/lib/systemd/system/redis-server.service; enabled; preset: enabled) Active: active (running) since Thu 2024-06-27 15:28:45 UTC; 1h 21min ago Docs: http://redis.io/documentation, man:redis-server(1) Main PID: 16918 (redis-server) Status: "Ready to accept connections" Tasks: 5 (limit: 2269) Memory: 3.3M (peak: 3.8M) CPU: 8.034s CGroup: /system.slice/redis-server.service └─16918 "/usr/bin/redis-server 0.0.0.0:6379"
Secure Redis®
Redis® does not require authentication by default which enables unrestricted access for system users to available databases on the server. In the following steps, enable authentication to secure your Redis® server and only accept authorized user access.
Open the main Redis® configuration file.
console$ sudo nano /etc/redis/redis.conf
- Find the following
requirepass
directive, uncomment it, and replacefoobared
with a strong password of your choice.
inirequirepass strong-password
Save and close the file.
The above configuration enables authentication on your Redis® server using the specified user password. Uncomment the
aclfile
directive to enable multiple users with unique passwords authorized to access your Redis® server.- Find the following
Restart the Redis® server to apply your configuration changes.
console$ sudo systemctl restart redis
Access the Redis® Server
The Redis® server accepts connection requests using the redis-cli
utility or compatible application modules on your server. In the following steps, access the Redis® server and test access write sample data to the default database to test your server configurations.
Connect to the Redis® server.
console$ redis-cli
Test access to the server without authentication.
127.0.0.1:6379> ping
Verify that your request fails with the following output:
(error) NOAUTH Authentication required.
Log in to the Redis® server using a valid password set in your configuration. Replace
strong-password
with the actual password you set earlier.console127.0.0.1:6379> auth strong-password
Output:
OK
Test access to the database server again.
console127.0.0.1:6379> ping
Output:
PONG
Select a database to use on your server. For example
1
.127.0.0.1:6379> SELECT 1
Create a new sample key
testkey
with a value such asGreetings from Vultr!
.console$ 127.0.0.1:6379[1]> set testkey "Greetings from Vultr!"
Output:
OK
Query the key value from the database.
console$ 127.0.0.1:6379[1]> get testkey
Output.
"Greetings from Vultr!"
Exit the Redis® CLI.
console$ 127.0.0.1:6379[1]> exit
Conclusion
You have installed Redis® on your Ubuntu 24.04 server and configured it to accept secure connection requests. You can integrate your Redis® server with your existing web applications to work as a database or cache to optimize your application and server performance. For more information and usage options, visit the official Redis® documentation.