• docker start starts a container so it is running.

• docker stop stops a running container.

• docker restart stops and starts a container.

• docker pause pauses a running container, "freezing" it in place.

• docker unpause will unpause a running container.

• docker wait blocks until running container stops.

• docker kill sends a SIGKILL to a running container.

• docker attach will connect to a running container.

• docker ps shows running containers.

• docker logs gets logs from container.

• docker inspect looks at all the info on a container.

• docker events gets events from container.

• docker port shows public facing port of container.

• docker top shows running processes in container.

• docker stats shows containers' resource usage statistics.

• docker diff shows changed files in the container's FS.

• docker cp copies files or folders between a container and the local filesystem.

• docker export turns container filesystem into tarball archive stream to STDOUT.

• docker images shows all images.

• docker import creates an image from a tarball.

• docker build creates image from Dockerfile.

• docker commit creates image from a container, pausing it temporarily if it is running.

• docker rmi removes an image.

• docker load loads an image from a tar archive as STDIN, including images and tags (as of 0.7).

• docker save saves an image to a tar archive stream to STDOUT with all parent layers, tags & versions (as of 0.7).

• docker history shows history of image.

• docker tag tags an image to a name (local or registry).

• docker login to login to a registry.

• docker logout to logout from a registry.

• docker search searches registry for image.

• docker pull pulls an image from registry to local machine.

• docker push pushes an image to the registry from local machine.

• docker system prune clears dangling images, exited containers and unused layers
• docker volume prune clears the unused volumes
• docker network prune
• docker container prune
• docker image prune clears all unused images

docker ps -a shows running and stopped containers. docker stats --all shows a list of all containers, default shows just running.

# Get the server version
docker version --format '{{.Server.Version}}'

Load an image from file:

docker load < my_image.tar.gz

Save an existing image:

docker save my_image:my_tag | gzip > my_image.tar.gz

docker run -it -c 512 agileek/cpuset-test

docker run -it -m 300M ubuntu:14.04 /bin/bash

• .dockerignore
• FROM Sets the Base Image for subsequent instructions.
• MAINTAINER (deprecated - use LABEL instead) Set the Author field of the generated images.
• RUN execute any commands in a new layer on top of the current image and commit the results.
• CMD provide defaults for an executing container.
• EXPOSE informs Docker that the container listens on the specified network ports at runtime. NOTE: does not actually make ports accessible.
• ENV sets environment variable.
• ADD copies new files, directories or remote file to container. Invalidates caches. Avoid ADD and use COPY instead.
• COPY copies new files or directories to container. By default this copies as root regardless of the USER/WORKDIR settings. Use --chown=<user>:<group> to give ownership to another user/group. (Same for ADD.)
• ENTRYPOINT configures a container that will run as an executable.
• VOLUME creates a mount point for externally mounted volumes or other containers.
• USER sets the user name for following RUN / CMD / ENTRYPOINT commands.
• WORKDIR sets the working directory.
• ARG defines a build-time variable.
• ONBUILD adds a trigger instruction when the image is used as the base for another build.
• STOPSIGNAL sets the system call signal that will be sent to the container to exit.
• LABEL apply key/value metadata to your images, containers, or daemons.