Prune

New in docker 1.13 is the sub-command prune.
This sub-command can be used with container, volume, image and network.

Delete all stopped containers

$ docker container prune

Delete all unused images and all dangling images

$ docker image prune

Prune everything at once

The next command will prune everything in a single command.

It will cleanup the following:

• Stopped containers
• all volumes not used by at least one container
• all networks not used by at least one container
• all dangling images

$ docker system prune

Docker Disk usage

Another cool new feature is the ability to see whats in use by docker on your system.
It also shows you how much disk space can be reclaimed by running a prune command.

$ docker system df

TYPE                TOTAL               ACTIVE              SIZE                RECLAIMABLE
Images              1                   0                   771.4 MB            771.4 MB (100%)
Containers          0                   0                   0 B                 0 B
Local Volumes       0                   0                   0 B                 0 B

Sub commands

As you may have noticed, the Docker CLI has been growing and growing. With more than 40 commands, things were starting to get ouf of hand. This is why 1.13 puts a lot more focus on sub-commands.

You can still use the old commands for now, but it’s probably a good idea to switch to the new style for new code.

docker attach      ->  docker container attach
docker commit      ->  docker container commit
docker cp          ->  docker container cp
docker create      ->  docker container create
docker diff        ->  docker container diff
docker exec        ->  docker container exec
docker export      ->  docker container export
docker kill        ->  docker container kill
docker logs        ->  docker container logs
docker pause       ->  docker container pause
docker port        ->  docker container port
docker inspect     ->  docker {container,image} inspect
docker ps          ->  docker container ls
docker rename      ->  docker container rename
docker restart     ->  docker container restart
docker rm          ->  docker container rm
docker run         ->  docker container run
docker start       ->  docker container start
docker stats       ->  docker container stats
docker stop        ->  docker container stop
docker top         ->  docker container top
docker unpause     ->  docker container unpause
docker update      ->  docker {container,node,swarm} update
docker wait        ->  docker container wait
docker build       ->  docker image build
docker history     ->  docker image history
docker images      ->  docker image ls
docker import      ->  docker image import
docker load        ->  docker image load
docker pull        ->  docker image pull
docker push        ->  docker image push
docker rmi         ->  docker image rm
docker save        ->  docker image save
docker tag         ->  docker image tag
docker deploy      ->  docker stack deploy
docker events      ->  docker system events