Starting, stopping, and removing containers

You successfully ran a container in the previous section. Now, we want to investigate in detail what exactly happened and why. Let’s look again at the command we used:

$ docker container run alpine echo "Hello World"

This command contains multiple parts. First and foremost, we have the word docker. This is the name of the Docker Command-Line Interface (CLI) tool, which we are using to interact with Docker Engine, which is responsible for running containers. Next, we have the word container, which indicates the context we are working with, such as container, image, or volume. As we want to run a container, our context is container. Next is the actual command we want to execute in the given context, which is run.

Let me recap – so far, we have docker container run, which means, “hey Docker, we want to run a container.”

Now we also need to tell Docker which container to run. In this case, this...