How to Remove Old and Unused Docker Images?
Since the docker version 1.13 you can use the docker prune command to remove all dangling data such as containers stopped, volumes without containers, and images with no containers.
To remove dangling docker images you execute the following command:
docker image prune
You can also add an optional -a option to the command to remove all dangling as unused images. Unused, in this case, means unreferenced by another container
docker image prune -a
Docker before version 1.13
To remove dangling and unused docker images, you can use the following commands:
docker rm -v $(docker ps --filter status=exited -q 2>/dev/null) 2>/dev/null
docker rmi $(docker images --filter dangling=true -q 2>/dev/null) 2>/dev/null
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