Installing Docker

Installing Docker is very fast and easy, so much so that it barely constitutes its own section. In the last chapter, we had to install several packages in order to get a Kernel-based Virtual Machine (KVM) virtualization server up and running as well as tweak some configuration files. In comparison, installing Docker is effortless, as you only need to install the docker.io package:

sudo apt install docker.io

Yes, that’s all there is to it. Installing Docker was definitely much easier than setting up KVM, as we did in the previous chapter. Ubuntu includes Docker in its default repositories, so it’s only a matter of installing this one package and its dependencies. You’ll now have a new service installed on your machine, simply titled docker. In order to be useful, the service needs to be running. You can check to see whether or not it’s already running with the following command:

systemctl status docker

Check the output...