Once Docker is installed on the host machine, it runs as a daemon process. The interface given to users is a Docker client. Communication between Docker daemon and users happens through Docker client. Docker provides a variety of commands for different needs, which helps to automate the deployment process very easily. Now we will learn different Docker commands. As this is not a Docker book, the discussion will be limited to some basic commands. You can refer to the following Docker website for the complete reference guide at https://docs.docker.com/reference/.