Awesome Docker Cheatsheet: Comprehensive Quick Reference for Developers

ultimate-docker-cheatsheet.md

🐳 Ultimate Docker Cheatsheet

An ultimate cheatsheet for Docker developers: commands, concepts, and best practices at your fingertips.

📒 Table of Contents

• Basic Commands
• Images
• Containers
• Volumes
• Networks
• Dockerfile Commands
• Docker Compose
• Docker Swarm
• Registry
• Troubleshooting

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Basic Commands

Command	Description
docker --version	Check Docker version installed
docker --help	Display help for Docker commands
docker info	Show detailed Docker system information

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Images

Command	Description
docker images	List all Docker images on your system
docker pull <image>	Download an image from a registry
docker rmi <image_id>	Remove an image from your system
docker build -t <name> .	Build image from Dockerfile in current directory
docker tag <src> <name>:<tag>	Tag an existing image with new name/tag
docker inspect <image_id>	Display detailed information about an image
docker save -o <file.tar> <image>	Save image to a tar archive
docker load -i <file.tar>	Load image from a tar archive
docker export -o <file.tar> <container>	Export container filesystem as a tar archive
docker import <file.tar> <new_image>	Create a new image from a tar archive

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Containers

Command	Description
docker ps	List running containers
docker ps -a	List all containers (including stopped)
docker run <image>	Run a container from an image
docker run -d <image>	Run a container in detached (background) mode
docker attach <container>	Attach terminal to a running container
docker start <container>	Start a stopped container
docker stop <container>	Stop a running container
docker restart <container>	Restart a running container
docker rm <container>	Remove a stopped container
docker kill <container>	Kill a running container immediately
docker logs <container>	Fetch logs of a container
docker rename <old> <new>	Rename a container
docker pause <container>	Pause all processes in a container
docker unpause <container>	Unpause a paused container
docker inspect <container>	Display detailed info about a container
docker commit <container> <new_image>	Create a new image from container changes
docker stats <container>	Display resource usage statistics
docker top <container>	Display running processes inside a container
docker exec -it <container> <cmd>	Execute a command inside a running container

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Volumes

Command	Description
docker volume create <vol>	Create a named volume
docker volume ls	List all volumes
docker volume inspect <vol>	Show details of a volume
docker volume rm <vol>	Remove a volume
docker run -v <vol>:<path>	Mount volume into container

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Networks

Command	Description
docker network ls	List all networks
docker network create <net>	Create a new network
docker network inspect <net>	Show details of a network
docker network connect <net> <container>	Connect a container to a network
docker network disconnect <net> <container>	Disconnect a container from a network
docker network rm <net>	Remove a network

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Dockerfile Commands

Instruction	Description
FROM <base>	Specify base image
RUN <cmd>	Run command at build time
CMD ["exe", "param"]	Default command for container
ENTRYPOINT ["exe"]	Container’s main executable
COPY <src> <dest>	Copy files/directories
ADD <src> <dest>	Copy + unpack archives
ENV <key>=<val>	Set environment variable
EXPOSE <port>	Declare listening port
USER <user>	Set user
WORKDIR <path>	Set working directory

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Docker Compose

Command	Description
docker-compose up	Start services in foreground
docker-compose up -d	Start services in background
docker-compose down	Stop & remove containers, networks
docker-compose ps	List services
docker-compose logs	View service logs
docker-compose restart	Restart services
docker-compose scale <svc>=<n>	Scale a service

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Docker Swarm

Command	Description
docker swarm init	Initialize this node as a swarm manager
docker swarm join --token <t> <mgr>	Join node to a swarm
docker node ls	List nodes in the swarm
docker service create <opts> <image>	Create & deploy a service
docker service scale <svc>=<n>	Scale service replicas
docker service rm <svc>	Remove a service
docker service inspect <svc>	Show service details

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Registry

Command	Description
docker login <registry>	Log in to a registry
docker push <image>	Push image to registry
docker pull <image>	Pull image from registry
docker logout <registry>	Log out from a registry

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Troubleshooting

Command	Description
docker logs <container>	View container logs
docker inspect <obj>	Detailed info (container/image/volume/network)
docker system df	Display disk usage by Docker objects
docker system prune	Remove all unused containers, images, networks
docker container prune	Remove stopped containers
docker image prune	Remove dangling images
docker network prune	Remove unused networks

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