Containers, when stopped, are not removed by default. Let's stop our container and list the currently running containers:
Nothing running now. So, where are they? Well, the container is stopped and, while it's not using your processor and memory right now, it's using space. And it's not just that container, either; it's all the containers we ran before.
To see all containers, use the docker ps -a command:
Wow, that's a lot of containers. We can see that we have containers for practically all the images we built, and that ...