If the Redis server is not installed on the system install it. For the Ubuntu system use the following command
sudo apt-get update
sudo apt-get install redis-server
Once the Redis server is installed, open the terminal and start it using the following command
redis-server
This will start the Redis server. Note: with this redis server will start on default port 6379.
To customize the configuration create a custom file redis.conf add the proper configuration and start the server
redis-server /etc/redis/redis.conf
The above command to run the server will require the terminal to open so to run in the background use the following command
redis-server --daemonize yes
To test whether the Redis is running successfully ping using the Redis cli command
redis-cli ping
This will return the response PONG if it's running successfully