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docker-basic-commands.md

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Docker Basic Commands

Build Images

  • Create image using current directory’s Dockerfile
    docker build -t image-name .

  • List images
    docker images


Running Container

  • Create new container from specified image
    docker run image-name

  • Assign a name to the container
    docker run --name nick-name image-name

  • Run image with an entry point | override existing entrypoint
    docker run image-name cmd
    docker run image-name --entrypoint cmd

  • Run image in interactive mode
    docker run -it image-name

  • Run image in detached mode
    docker run -d image-name

  • Run image mapping container's port to the host
    docker run -p host-port:container-port image-name


Managing Containers

  • List running containers
    docker ps

  • List all containers
    docker ps -a

  • Stop one or more running containers
    docker stop containerId

  • Start one or more stopped containers
    docker start containerId

  • Fetch the logs of a container
    docker logs containerId

  • Fetch and follow log output of a container
    docker logs -f containerId

  • Run a command in a running container in interactive mode
    docker exec -it containerId cmd

  • Copy files/folders from container to local filesystem
    docker cp containerId:/workdir/file.ext .

  • Copy files/folders from local filesystem to container
    docker cp file.ext containerId:/workdir/

  • Remove container
    docker rm containerId

  • Remove running container
    docker rm -f containerId

  • Remove all running and stopped containers
    docker rm -f $(docker ps -a -q)


Persistant data using Volumes

  • Creates a new volume that containers store data
    docker volume create volume-name

  • Display detailed information on one or more volumes
    docker volume inspect volume-name

  • List volumes
    docker volume ls

  • Create a volume and then configure the container to use it
    docker run -v volume-name:/dir/dir container-name

  • Create mapping between dir in host and container
    docker run -v $(pwd):/workdir container-name


Managing Images

Tagging Images

  • Create tag to the image while building
    docker build -t image-name:tag .

  • Create tag to the image after building
    docker image tag src-image:latest dst-image:tag

Saving & Loading Images

  • Save one or more images to a tar archive
    docker image save -o image-name.tar image-name:tag

  • Load an image from a tar archive
    docker image load -i image-name.tar

Remove Images

  • Remove one or more images
    docker image rm image-name
    docker rmi image-name

  • Remove all images
    docker system prune -a

  • Remove all stopped containers
    docker container prune

  • Remove all dangling images
    docker image prune

  • Remove all unused containers, networks, dangling and unreferenced images
    docker system prune