03. Docker CLI Commands

Docker CLI Commands

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Prerequisites

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1. What is Docker CLI Commands

This section introduces commonly used Docker commands with clear explanations and examples.

2. CLI Commands

docker run <image>
docker run -it --entrypoint bash <image>
docker start <container_id>
docker stop <container_id>
docker rm <container_id>
docker rm -f $(docker ps -aq)
docker rm -f $(docker ps -q)
docker cp <container_id>:<path> <host_path>
docker commit <container_id> <new_image_name>
docker rmi <image>

2-1. Run Container

docker run <image>

Creates and starts a new container from an image.

Example:

docker run nginx

2-2. Run with Interactive Shell

docker run -it --entrypoint bash <image>

• -it → interactive terminal
• --entrypoint bash → override default command

Example:

docker run -it --entrypoint bash ubuntu

Useful for debugging inside container

2-3. Start Existing Container

docker start <container_id>

Starts a stopped container.

2-4. Stop Running Container

docker stop <container_id>

Gracefully stops a running container.

2-5. Remove Container

docker rm <container_id>

Deletes a stopped container.

2-6. Force Remove Container

docker rm -f <container_id>

• Stops + removes container immediately

2-7. Remove All Containers

docker rm -f $(docker ps -aq)

• docker ps -aq → all container IDs
• Removes everything (running + stopped)

2-8. Remove Running Containers Only

docker rm -f $(docker ps -q)

• docker ps -q → running containers only

2-9. Copy Files Between Host and Container

docker cp <container_id>:<path> <host_path>

Example:

docker cp my_container:/imgs C:\backup

2-10. Create Image from Container (Commit)

docker commit <container_id> <new_image_name>

Example:

docker commit 123abc my-image

Saves container state as a new image

Not recommended for production → use Dockerfile instead

2-11. Remove image

docker rmi <image>

Deletes a stopped image.