docker:tldr:82b06

docker: List all Docker images not used by any container.

docker

$ docker images --filter dangling=true

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The command docker images retrieves a list of all the available Docker images on a system. The option --filter is used to apply filters to the images list.

In this particular command, --filter dangling=true is used to filter the images list and only show the dangling (or unused) images.

Dangling images are those that are not associated with any containers or tags. They are typically created when a new image is built, an image is pulled from a registry, or when an image is deleted without removing its associated containers. These dangling images consume disk space and are not actively used, so it's a good practice to periodically remove them to free up disk space.

By running docker images --filter dangling=true, you can get a list of only the dangling images that need to be removed from your system.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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