Docker rm all container / Docker rmi all images

 1. Docker rm  all containers  

docker ps -a | grep -i exited | tail -n +2 | awk '{print $1 }' | xargs docker rm 

# grep -i exited: filter exited docker containers by grep.
# tail -n +2: start from line2, skip header line.
# awk '{print $1}' :print the containerID
# send to docker rm for delete 

docker images | tail -n +2 | awk '{print $3 }' | xargs docker rmi 

# tail -n +2: start from line2, skip header line.
# awk '{print $3}' :print the imageID
# send to docker rmi for delete