Engine

docker system 
df -disk usage 
events - real-time event 
info - system-wide info
prune - remove unused data - all stopped container, unused network dangling images and cache.

system

Image

  docker image ls --digests // see SHA256 of images
  docker image ls --filter reference="*:latest"
  docker image ls --filter dangling=true
  docker inspect
  docker 

container

  docker run --restart alway/unless-stopped/on-failed

docker-compose

 docker-compose up -d
 docker-compose down
 docker-compose ps
 docker-compose top
 docker-compose stop
 docker-compose restart