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Cheatsheet: Docker

 
version check

        docker version

Create a container — setup File System Snapshot to be used

docker create <image-name>

Start a container — Executes startup command

      -a - will show you all the logs/info coming out of the container 

docker start -a <container-ID>

run a docker container from image — Create + Start

docker run <image-name>

Default command override

docker run <image-name> <override-command>
Eg: "docker run busybox ls”

List all running containers

docker ps

List all containers ever created

docker ps --all

Remove stopped containers

    — have to redownload images 

docker system prune  

Logs from container

docker logs <container-ID>

Stop a container 

— A hardware signal “SIGTERM" is sent to process, this gives time for program to clean-up and shut down
— If container doesn’t stop in 10 secs after issuing SIGTERM, then docker will issue a kill command
    docker stop <container-ID>

Kill a container 

— A hardware signal “SIGKILL" is sent to process, shutdowns immediately without proceeding any further
    docker kill <container-ID>

Execute additional commands inside containers

-it — allows to provide input to the container

docker exec -it <container-ID> <command>

Eg: SSH into container
docker exec -it <container-ID> sh

Remove container

        — Container can only be removed, if it's not running 
    docker container rm <container-ID>

Remove image

        — To delete an image, it shouldn't be associated with any container
    docker image rm <image-name>

List all images

    docker images

Happy Coding ðŸ‘¨‍💻
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