# check if docker
cat /proc/1/cgroup
# see all images
docker images
# see all containers
docker ps --all
# remove
docker rm <CONTAINER_ID>
docker rmi <IMAGE_ID>
# run
sudo docker run -it <IMAGE_ID> bash
# remove all containers
docker rm $(docker ps -a -f status=exited -q)
# remove all images
docker rmi $(docker images -a -q)