Life's random bits By b1thunt3r (aka Ishan Jain)…
Docker Cheat Sheet

Docker Cheat Sheet

Ishan jain
A little cheat sheet for Docker, when you just remember a specific command.


  • Layer
  • Image
  • Container
  • Registry
  • Docker Engine / Daemon
  • Docker Compose

Useful commands for creating and running containers

Download an image

docker pull image_name

Start and Stop a container

docker [start|stop] container_id|container_name

Create and start a continuer

docker run -it --name container_name image_name command

Create and start a container, and destroy after execution

docker run --rm -it image_name command

Map filesystem, port and environment variables

  • Container 80 🠦 Host 8080
  • Host /home/user/container_data 🠦 Container /data
  • Variable: HTTP_PROXY 🠦 http://proxy.tld:port/
docker run -it --rm -p 80:8080 -v /home/user/container_data:/data -e HTTP_PROXY="http://proxy.tld:port/" image_name command

Create and start a container as daemon (service)

docker -d --name container_name image_name command

Useful commands for cleaning up

Force stop (kill) a container

docker kill container_id|container_name

KIll all running containers

docker kill $(docker ps -q)

Remove stopped a container

docker rm container_id|container_name

Force remove a running container

docker rm --force container_id|container_name

Remover all stopped containers

docker rm $(docker ps -q)

Interact with containers

Run a command inside a running container

docker exec -it container_id|container_name command

Show logs from a running container

docker logs -ft container_id|container_name 
docker attach

Create an image from container

docker commit  -m "commit message" -a "author" container_id|container_name username/image_name:tag

Docker File


Example of a dockerfile to run busybox

FROM scratch
ADD busybox.tar.xz /
CMD ["sh"]


  • FROM scratch: use scratch as base image.
  • ADD busybox.tar.xz /: Copy busybox from working directory (same as Dockerfile) and extract it to /.
  • CMD ["sh"]: tell docker start sh.

Build container

docker build .

Replace . with the path to Dockerfile, to use a Dockerfile in another directory.

Docker Compose

Example of a docker-compose.yml to run a Wordpress blog.

version: '3.3'

     image: mysql:5.7
       - db_data:/var/lib/mysql
     restart: always
       MYSQL_ROOT_PASSWORD: somewordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress

       - db
     image: wordpress:latest
       - "8000:80"
     restart: always
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: wordpress


  • version: specify which version of docker-compose to use.
  • services: list of images to use
    • image: specify which image to use
    • depends_on: tell docker other image dependencies
    • volumes: refer persistent data storage defined below
    • ports: what ports to expose, otherwise you will not be able to access the application
    • restart: always: tells docker to restart image, each restart
    • environment: define environment variables
  • volumes: list of persistent data storage