Cheatography
https://cheatography.com
A detailed cheatsheet on Docker
This is a draft cheat sheet. It is a work in progress and is not finished yet.
Dockerfile
FROM <existing-image>
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Specifies an existing image to build on top of |
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Set the working directory inside the container for all subsequent commands in the Dockerfile |
COPY <source> <destination>
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Takes files or folders from your build context on your machine and places them inside the image’s filesystem |
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Prepare the environment once, so every container starts ready to go |
CMD ["exec", "arg1", "arg2"]
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Define what the container actually does when launched |
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Container and Image Management
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Lists currently running containers. -n
Show last n
created containers -a
List all containers -n
Last n
containers -q
Only container IDs |
docker start <container_name_or_id>
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Restart a stopped container |
docker stop <container_name_or_id>
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Stop a container |
docker rm <container_name_or_id>
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Remove a container |
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List all images |
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Remove an image |
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Download an image from a registry |
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docker build
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Give your image a name |
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Path to a specific Dockerfile. Need when your Dockerfile is not named "Dockerfile" or not in the current directory. |
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Passes build-time variables (used with ARG
in Dockerfile) |
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Forces all layers to rebuild. Good when debugging inconsistent builds |
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Always pulls the latest version of the base image |
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Specifies architecture (helpful for multi-arch builds, Apple Silicon, etc.) |
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Outputs only the final image ID (surpresses verbose logs) |
Turns a directory (with a Dockerfile) into an image
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docker run
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Runs the container in the background |
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Maps a container port to a host port |
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Gives the container a specific name |
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Real-time sharing of given directory between your computer and the container |
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Automatically removes the container when it stops |
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Used for interactive shells |
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Pass given variables into into the container |
Starts a container from an image
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