Remove a Specific Docker Image

Question

I am using docker for different projects. When I run the command:

sudo docker images

It shows list of images with labels but there are a few images with no label or tag.

I want to know:

1. What are these images with no label
2. How to delete these images (as these are taking a large amount of space)

Answer 1

A Docker image with no label is sometimes referred to as a “dangling image”. These may be unused leftovers that have accumulated over time. You can remove any unused images all at once like this:

sudo docker image prune

You’ll get a standard message:

WARNING! This will remove all dangling images.
Are you sure you want to continue? [y/N]

Hit Y if you’re okay with the action.

To remove specific images, you can do this:

sudo docker image rm {image id}

You can remove multiple images by adding more IDs to the command. If any of the images are required by a container, then you’ll get a message like:

Error response from daemon: conflict: unable to remove repository reference "Fedora Workstation" (must force) - container cd20b396a061 is using its referenced image 75835a67d134