cleaning up docker by removing images and containers

When one play with docker for a while, we end up having lot of images and containers which are not used. Its important to delete them to reclaim resources.

here is a script / snippet that can be added to .bashrc / .profile or just to the current shell

# Use `docker-cleanup --dry-run` to see what would be deleted.

function docker-cleanup {
  EXITED=$(docker ps -q -f status=exited)
  DANGLING=$(docker images -q -f "dangling=true")

  if [ "$1" == "--dry-run" ]; then
    echo "==> Would stop containers:"
    echo $EXITED
    echo "==> And images:"
    echo $DANGLING
  else
    if [ -n "$EXITED" ]; then
      docker rm $EXITED
    else
      echo "No containers to remove."
    fi
    if [ -n "$DANGLING" ]; then
      docker rmi $DANGLING
    else
      echo "No images to remove."
    fi
  fi
}

The comments used are derived from:

docker rm $(docker ps -q -f status=exited)
docker rm $(docker ps -q -f status=exited)

few more commands:

This is asper docker docs:

docker rm `docker ps -aq`

The ultimate clean up

docker system prune