Essential Docker Commands: From Images to Containers and Registry

1. View Docker Information

Check Docker version: docker version Show system information:

docker info

2. Image Operations

Search for an image: docker search image_name Download an image: docker pull image_name List images: docker images Remove one or more images: docker rmi image_name Show image history:

docker history image_name

3. Run Containers

Run a container to echo "hello word": docker run image_name echo "hello word" Start an interactive shell: docker run -i -t image_name /bin/bash Install a program inside a container:

docker run image_name apt-get install -y app_name

4. Inspect Containers

List running containers: docker ps List all containers: docker ps -a Show the most recently started container:

docker ps -l

5. Save Container Changes

Create a new image from a container:

docker commit ID new_image_name

6. Container Management

Remove all containers: docker rm `docker ps -a -q` Remove a single container: docker rm Name/ID Stop, start, or kill a container: docker stop Name/ID, docker start Name/ID, docker kill Name/ID Fetch container logs: docker logs Name/ID Show changed files/directories: docker diff Name/ID Display processes inside a container: docker top Name/ID Copy files from container to host: docker cp Name:/container_path to_path or docker cp ID:/container_path to_path Restart a running container: docker restart Name/ID Attach to a running container:

docker attach ID

7. Save and Load Images

Export an image to a tar file: docker save image_name -o file_path Import an image from a tar file:

docker load -i file_path

8. Login to Registry

Log in to a Docker registry:

docker login

9. Publish Image

Push an image to a registry:

docker push new_image_name