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    Home»Caching Server»How To Install Redis on Debian 10

    How To Install Redis on Debian 10

    RahulBy RahulJuly 7, 20203 Mins ReadUpdated:July 7, 2020

    Redis is an in-memory data structure store, used as a database server, cache, and message broker. Redis is written in C programming language. It also provides a PHP module for communication between PHP script with the Redis server.This tutorial will help you to install Redis server on Debian 10 Linux system. This will also help you to install Redis PHP extensions on your system.

    Prerequisites

    You must have shell access with sudo privileged account access to Debian 10 system. First of all, Login to your system and upgrade the current packages.

    sudo apt update && sudo apt upgrade
    

    Step 1 – Install Redis on Debian 10

    Redis packages are available under the default apt repository. You can directly install Redis on Debian 10 system without adding any PPA. Run the following command to install Redis on Debian:

    sudo apt install redis-server
    

    After installation, enable Redis service to start on system boot.

    sudo systemctl enable redis-server
    

    Step 2 – Configure Memory for Redis

    Redis can be started without a configuration file using a built-in default configuration. But to make any extra parameter changes you can use its configuration file that is: /etc/redis/redis.conf. Edit the Redis configuration file in a text editor to make changes

    sudo vim /etc/redis/redis.conf
    

    Update the following values in Redis configuration file according to your requirement. You can increase max memory limit as per available on your server.

    maxmemory 256mb
    maxmemory-policy allkeys-lru
    

    The above configuration tells Redis to remove any key using the LRU algorithm when the max memory of 256mb is reached. Save the configuration file and restart the Redis service:

    sudo systemctl restart redis-server
    

    Step 3 – Install Redis PHP Extension

    This is an optional step. If you need to connect Redis from PHP application, You need to install Redis PHP extension on your Debian system. To install Redis PHP extension, simply type:

    sudo apt install php-redis
    

    The installer will automatically enable redis extension for all the pre installed PHP versions. If you installer new PHP version after this, you can use below command to enable redis module. For example to enable extension for PHP 7.4, type:

    sudo phpenmod -v 7.4 -s ALL redis
    

    Step 4 – Connect to Redis Server

    Use redis-cli tool to verify the connection between the Redis server.

    redis-cli
    
    127.0.0.1:6379> ping
    PONG
    
    

    Few more examples of redis-cli command line tool. You can find more details about redis-cli here.

    redis-cli info
    redis-cli info stats
    redis-cli info server
    

    How to Install Redis on Debian 10

    Conclusion

    This tutorial helps you with the installation of Redis server on Debian 10 system.

    Caching Debian 10 redis
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