Day-20: Docker Commands Cheat-sheet

Now it's time to take your Docker skills to the next level by creating a comprehensive cheat-sheet of all the commands you've learned so far. This cheat-sheet should include commands for Docker, Dockerfile, Docker-Compose, Docker Volume as well as brief explanations of their usage. This cheat-sheet will not only help you in the future but also contribute to the DevOps community by providing a useful resource for others.😊🙌

Basic Commands

1. sudo apt install docker.io : To install docker

2. docker -v / --version : Shows the installed docker version

3. systemctl start docker / service docker start : Start docker service

4. systemctl stop docker / service docker stop: Stop the docker service

5. systemctl status docker / service docker status: Check the docker service status

6. docker ps : Lists only running containers

7. docker ps -a : Shows all containers including created, running, and exited.

8. docker images -a : Lists all images created

9. docker logs : Shows the logs of the container

10. docker inspect [container-name/image/volume]: View detail information about an image, container, volume

11. docker stats : View resource usage statistics for one or more containers

12. docker port : List the port mappings for a container

13. docker top : To view the processes inside a container

Manage images and containers - Commands

1. docker pull [username/repository:tag] : Download images from registry or

   docker pull [image-name]

2. docker build -t [tagname/new-image-name] [directory/] : Build a new docker image from Docker file

3. docker run [image] : Starts a new container from an image

4. docker run --name [container] [image] : Start new container and assign a name of container

5. docker run -d [image] : Starts a new container in backend

6. docker run -p [Hostport]:[container-port] [image] : Start new container with map ports to container

7. docker run -it [image] : Start new container in interactive mode(Login to the container)with the image through command line

8. docker run -e [myvar=myprop] [image] : Specify an environmental variable for a docker container

9. docker exec -it [container-ID/name] [executable] : Start a shell or entering inside a running container or log in to the running container

10. docker rename [oldname] [newname] : Rename the container

11. docker save [image] > [archivefile] or

    docker save -o [archivefile] [image] : Save an image to a tar archive

12. docker commit [container-name] [imagename] : Create an image of docker container

13. docker load -i [archivefile] : Load an image to a tar archive

14. docker kill [container] : Forced shutdown of running container

15. docker rm [container-name/id] : Delete the stop container

16. docker rm -f [container-name/id] : Delete the running container

17. docker rm $(docker ps -a -q) : Delete all running container

18. docker rmi [image] : Delete a docker image

19. docker rmi $(docker images -q) : Delete all docker images

20. docker system prune : Delete all dangling containers, unused images and containers

21. docker login : Login cli session with registry like Dockerhub using credentials

    It will ask to enter the username and password

22. docker remote -v : Lists out remote docker host

23. docker tag [image] [registry-username/repository:tag] : Set the tag for images pushed to Dockerhub

24. docker push [registry-username/repository:tag] : Upload images to registry

Docker-Compose & Volumes -Commands

1. docker-compose config : Validate the docker-compose file

2. docker-compose up -d: Start multiple containers at once in background from the docker-compose file

3. docker-compose ps : Lists running containre created from docker-compose file

4. docker-compose ps -a : Lists all running and stoped containre created from docker-compose file

5. docker-compose down : Stop all running containers and also remove them

6. docker compose logs : Shows the logs of running containers with docker compose

7. docker compose -d --scale up [service]=[no. of times] : Scale up the services or containers with limited times as prescribed in yaml file

8. docker service [service] --replicas [no. of times] [image]: Autoscaling services with set number of times

9. docker volume ls : Lists all volumes

10. docker volume create [volume] : Create a volume in the machine

11. docker run -v [HostDir:TargetDir] -it [container] [image] : Create and connect a container to a volume or mapping local directory with a docker container

12. docker volume rm [volume] : Delete unused volume from machine

13. docker volume prune : Delete all the available docker volumes

14. docker volume inspect [volume-name] : Inspects the volume (Detailed information about volume)

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Thank you for reading the article.

Thanks for your valuable time.

Happy Learning !... Keep Learning ! 😊