Essential Docker Commands

The core Docker CLI commands every beginner needs: pull, run, ps, logs, exec, stop, and rm.

Docker Beginner 6 min read

Updated 2026-04-12

A compact mental map

Docker commands fall into a few natural groups: working with images, managing containers, and inspecting what is running. You will reach for the same eight or so commands in almost every session.

The essential starter commands

docker pull nginx           # download an image from Docker Hub
docker run -d -p 8080:80 nginx  # start container in background, map ports
docker ps                   # list running containers
docker ps -a                # list all containers including stopped
docker logs <name or id>    # view container output
docker exec -it <name> /bin/bash  # open shell inside running container
docker stop <name or id>    # send stop signal to container
docker rm <name or id>      # delete a stopped container

Run them one at a time and read the output carefully. Each command prints helpful information about what happened.

You can use the first few characters of a container ID instead of the full ID. Docker will match it as long as those characters are unique.

Focus on meaning, not memorization

Instead of memorising every flag, understand what each command represents in the container lifecycle.

pull — fetch the image template
run — create and start a container from an image
ps — see what is alive right now
logs — read what the container has been printing to stdout
exec — step inside a running container for debugging
stop — ask the container to shut down gracefully
rm — clean up containers you no longer need

With these seven concepts you can handle most day-to-day Docker work. Everything else builds on top of them.

[ { "question": "What does docker ps show by default?", "options": [ "All images on the system", "Only running containers", "All containers including stopped ones", "Docker Hub search results" ], "answer": 1, "explanation": "docker ps lists only running containers. Add -a to include stopped containers." }, { "question": "How do you start an interactive shell inside a running container named myapp?", "options": [ "docker shell myapp", "docker open myapp /bin/bash", "docker exec -it myapp /bin/bash", "docker attach myapp --shell" ], "answer": 2, "explanation": "docker exec -it runs an interactive command inside a running container. -i keeps stdin open; -t allocates a TTY." }, { "question": "What is the effect of docker rm on a container?", "options": [ "It stops the container", "It removes the image from disk", "It deletes the stopped container", "It restarts the container" ], "answer": 2, "explanation": "docker rm removes a stopped container. Use docker stop first if the container is still running." } ]

Essential Docker Commands

A compact mental map

The essential starter commands

Focus on meaning, not memorization

Small technical takeaways

docker ps vs docker ps -a

Detached mode

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