One liner to stop / remove all of Docker containers:

docker stop $(docker ps -a -q)
docker rm $(docker ps -a -q)

Remove only stopped containers can be listed using:

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

Remove all dangling images

docker rmi $(docker images --filter "dangling=true" -q --no-trunc)

Remove conatiners of specific image

docker rm $(docker stop $(docker ps -a -q --filter ancestor="image-name" --format="{{.ID}}"))