• best source of docker wisdom: https://github.com/wsargent/docker-cheat-sheet

1. Create Dockerfile or clone docker repository
2. Run:

   docker build -t YourImage /path/to/dir/with/dockerfile

docker run -v /srv/elgoog:/mnt -d algoo

• -d detached
• -v volumes to bind in format /path/at/host:/path/in/container
• -m memory limit
• -c cpu limit

docker exec -it <containerIdOrName> bash

• first discover all running containers on host

  docker ps 

• output:

  root@xen-docker:~# docker ps
  CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
  d5e31d1cbe9c        algoo:latest        supervisord -n      3 seconds ago       Up 2 seconds        80/tcp              furious_hopper       
  ec704ed40100        algoo:latest        supervisord -n      4 seconds ago       Up 3 seconds        80/tcp              distracted_babbage 

• attach to the container by id (works only if COMMAND = bash)

  docker attach d5e31d1cbe9c

• The cleanest way how to copy files between host and container is to mount an image to the container

  docker run -v /path/to/hostdir:/mnt $container
  cp /mnt/sourcefile /path/to/destfile

• remove images from docker

  docker ps -a | grep 'Exited' | awk '{print $1}' | xargs --no-run-if-empty docker rm 

• delete them physically

  docker images --no-trunc| grep none | awk '{print $3}' | xargs -r docker rmi 

• http://blog.oddbit.com/2014/08/11/four-ways-to-connect-a-docker/