Docker Installation and Docker Commands
Docker Machine is a tool that can install Docker hosts. From a technical point of view, the installation is quite easy to do. Docker Machine loads an ISO CD image with boot2docker from the Internet.
boot2docker is a Linux distribution and that provides an easy way to run Docker containers. After that, the Docker Machine starts a virtual machine with this boot2docker image.
Particularly convenient with Docker machine is the fact that using Docker containers on external Docker hosts is just as easy as using local Docker containers. The Docker command-line tools only need to be configured to use the external Docker host. Afterward, the use of the Docker host is transparent.