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This guide describes how to install Redis server in Debian 11
We made in a few minutes using the console.

We log into the console and perform the installation:

apt-get install redis-server -y

We can check the service status by issuing an order:

systemctl status redis-server

Poniżej wynik:

? redis-server.service - Advanced key-value store
     Loaded: loaded (/lib/systemd/system/redis-server.service; enabled; vendor preset: enabled)
     Active: active (running) since Sun 2021-09-26 02:40:45 UTC; 3s ago
       Docs: http://redis.io/documentation,
             man:redis-server(1)
   Main PID: 379829 (redis-server)
     Status: "Ready to accept connections"
      Tasks: 5 (limit: 9510)
     Memory: 6.9M
        CPU: 62ms
     CGroup: /system.slice/redis-server.service
             ??379829 /usr/bin/redis-server 127.0.0.1:6379

Sep 26 02:40:45 debian11 systemd[1]: Starting Advanced key-value store...
Sep 26 02:40:45 debian11 systemd[1]: Started Advanced key-value store.
 
By default, Redis listens on port 6379. You can verify it using the following command:
 
To check the redis listening, we can execute the command:
 
ss -antpl | grep redis
 
We will see a similar log:
 
LISTEN 0      511        127.0.0.1:6379       0.0.0.0:*    users:(("redis-server",pid=379829,fd=6))                                                                                                      
LISTEN 0      1024       127.0.0.1:9121       0.0.0.0:*    users:(("redis_exporter",pid=14922,fd=3))                                                                                                     
LISTEN 0      511            [::1]:6379          [::]:*    users:(("redis-server",pid=379829,fd=7))  
 
We edit the redis configuration file:
 
nano /etc/redis/redis.conf
 
and add a sign # before. The whole should look like:
 
#bind 127.0.0.1 ::1
 
Thanks to this, our redis server will only listen locally.
 
We also set the amount of RAM in this file:
 
maxmemory 500mb 
maxmemory-policy allkeys-lru
 
We reboot:
 
systemctl restart redis-server
 
We can get to redis from the console by issuing a command:
 
redis-cli
 
Now for an example of operation.
 
issue the command:
 
127.0.0.1:6379> ping
 
We get the answer 
 
PONG
 
So everything works perfectly fine.
 
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