Install multiple Redis instances on ports 6379 and 6380 for Magento

Create the directory for the new instance

$ sudo install -o redis -g redis -d /var/lib/redis2
Create a new configuration file
$ sudo cp -p /etc/redis/redis.conf /etc/redis/redis2.conf
Edit the new configuration file
$ sudo nano /etc/redis/redis2.conf
pidfile /var/run/redis/
logfile /var/log/redis/redis-server2.log
dir /var/lib/redis2
port 6380
Create new service file
$ sudo cp /lib/systemd/system/redis-server.service /lib/systemd/system/redis-server2.service
Edit the new service file
$ sudo vim /lib/systemd/system/redis-server2.service
ExecStart=/usr/bin/redis-server /etc/redis/redis2.conf
Enable and start the service
$ sudo systemctl enable redis-server2.service
$ sudo systemctl start redis-server2.service
Check status
$ ps aux |grep redis

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