A small list of the commands most often used

Container commands

docker ps Check running containers
docker ps -a Check all containers
docker ps -s Check soze of running containers
docker ps -as Check size of all containers
docker stop nameofcontainer stopping a container
docker start nameofcontainer starting a container
docker restart nameofcontainer restarting a container
docker rm nameofcontainer !Removes container!
docker exec -it nameofcontainer bash lets you "ssh" to the container so you can troubleshoot and other stuff.

docker images -a Check images available
docker rmi nameofimage Removes image
docker inspect --format='{{.Id}} {{.Parent}}' $(docker images --filter since=97256f68a60a -q) removing any child images to the image specified after "since="

Warning, do not use this if you haven't saved your startup commands and used external storage for configs.

docker kill $(docker ps -q) Kill all running containers
docker rm $(docker ps -a -q) Delete all stopped containers (including data-only containers)
docker rmi $(docker images -q -f dangling=true) Delete all 'untagged/dangling' () images
docker rmi $(docker images -q) Delete ALL images