Exploring Image layers

• docker image ls shows images stored, including version information using tags
• docker image rm removes images
• docker history <imagelD> or docker history image:tag shows the different layers in the image
• Notice that each modification adds an image layer!

Tagging Images

• Tags allow you to assign names to images, which makes it easier to manage versions
• If no tag is added, "latest" is used as the default tag
• Manually tag images: docker tag myapache myapache:1.O
• Next, using docker image ls | grep myapache will show the same image listed twice, as 1.0 and as latest
• Tags can also be used to identify the target registry docker tag myapache localhost:5000/myapache:1.O