10 Docker Commands You Must Know

Welcome to our guide on managing Docker images and containers! Whether you’re new to Docker or looking to expand your knowledge, this comprehensive tutorial will equip you with the essential commands and techniques for handling Docker images and containers like a pro.

Images

Download an Image from a Registry Like DockerHub

docker pull image-name:tag

Replace image-name with the name of the Docker image, and tag with the version or tag you want to pull.

List All Images

docker images

Build an Image

docker build -t custom-image-name:tag .

Replace custom-image-name with the desired name for your image and tag with the version or tag.

Push an Image to a Registry

docker push image-name:tag

Replace image-name with the name of the Docker image and tag with the version or tag.

Remove an Image

docker rmi image-name:tag

Replace image-name with the name of the Docker image and tag with the version or tag. If you have running containers using the image, you may need to stop and remove them first.

Remove All Unused Images

docker image prune

This command removes all images that are not associated with any containers.

Save Image to Tar File

docker save -o image-name.tar image-name:tag

Load Image from Tar file

docker load -i image-name.tar

Replace image-name with the name of the Docker image and tag with the version or tag.

Containers

Run a Container

docker run -d -p local-port:service-port image-name:tag
docker run -d --name my-container -p local-port:service-port image-name:tag

Replace my-container with the desired container name, and image-name:tag with the Docker image and tag.

List Running Containers

docker ps
docker ps -a

Add the -a flag to include stopped containers

Start & Stop a Container

docker stop container-id
docker start container-id

Check Logs of a Container

docker logs container-id

Removing Containers

docker rm container-id
docker rm container-id -f
docker rm -f $(docker ps -a -q)

Add the -f flag to forcefully remove a running container

docker rm -f $(docker ps -a -q): Removes all containers, both running and stopped, by passing their IDs to the docker rm command.

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