# Here’s how I periodically purge my docker host:

# Kill running containers:
docker ps -q | xargs docker kill

# Delete all containers (and their associated volumes):
docker ps -q -a | xargs docker rm -v

# Remove all images:
docker images -q | xargs docker rmi

# Notes:
# The “-q” option prints the numeric ids
# The “xargs” command is a handy way to repeatedly run a docker command

# Update
# Delete only the containers that are not running. Parse the “ps” output for the “Exited” string:

docker ps -a | awk '/Exited/ {print $1}' | xargs docker rm -v
# Not perfect… Don’t give your container the name “Exited” :-)