Some Docker tips that should go into the Docker Cheat Sheet

docker-tips.md

View the file system of offline containers.

ls -l /var/lib/docker/aufs/diff/

Local storage of Docker images.

/var/lib/docker/<storage driver>

Deprecated Docker Tree Command

docker images --tree

Layers

ls -l /var/lib/docker/aufs/layers

docker commit <id> <name>
docker history <name>
docker save -o /tmp/<name> <name> (automatically TARs it)
docker load -i /tmp/<name>.tar