docker has a straightforward CLI that allows you to do almost everything you could want to a container. All of these commands use the image id (ex. be29975e0098), the image name (ex. myusername/webapp) and the container id (ex. 72d468f455ea) interchangably depending on the operation you are trying to do. This is confusing at first, so pay special attention to what you’re using.

That paragraph switches around pretty quick there. “You followin’ me, camera guy?!” My OODA loop just got chaffed up.

From Getting Started with docker, from CoreOS