This lesson's interactive features are locked, please to keep using them

Images

So a "container" is kinda like a lightweight VM, great... so what's an image?

Image: A read-only definition of a container
Container: an instance of a virtualized read-write environment

A container is basically an image that's actively running. In other words, you boot up a container from an image. You can create multiple separate containers all from the same image (it's kinda like the relationship between classes and objects).

Click to play video

Assignment

Docker has a getting started image, go ahead and pull it down onto your local machine:

docker pull docker/getting-started

All this does is copy the image file down on your local machine so you won't have to download it later to be able to use it.

Use the images command to view all the images you have saved. You should see the docker/getting-started listed:

docker images

Open the Docker Desktop app. You should also see the image there under the "images" tab.

Submit the CLI tests. There's no penalty on failure for this lesson.