We won't delve too deeply into running Docker as a separate tool. Our focus in this chapter is on using Docker to provision a Vagrant machine, which it does inside Vagrant during the boot up process. We will learn a few basic Docker commands—mainly those that are used during provisioning—to give you a better understanding of what is happening. 

If you are unsure of what specific command you need or would like to learn more, then you can run the docker command, which will list all available commands. This will show you the usage, command options, management commands, and general commands.