Docker Cheatsheet
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Docker is an open-source platform that automates the deployment, scaling, and management of applications using containerization. Containers are lightweight, portable, and consistent across different environments, making Docker a popular choice for developers and system administrators. Docker was first released in 2013 by Docker, Inc.
Docker Installation
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| Command/Option | Example | Description |
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| docker –version | docker --version | Check the installed Docker version |
| docker info | docker info | Display system-wide information |
Working with Docker Images
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| Command/Option | Example | Description |
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| docker pull | docker pull ubuntu | Download an image from Docker Hub |
| docker images | docker images | List all images on the local machine |
| docker rmi | docker rmi ubuntu | Remove an image from the local machine |
Working with Docker Containers
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| Command/Option | Example | Description |
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| docker run | docker run -it ubuntu | Run a command in a new container |
| docker ps | docker ps | List running containers |
| docker ps -a | docker ps -a | List all containers, including stopped ones |
| docker stop | docker stop container_id | Stop a running container |
| docker start | docker start container_id | Start a stopped container |
| docker rm | docker rm container_id | Remove a container |
| docker exec | docker exec -it container_id bash | Run a command in a running container |
Managing Docker Volumes
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| Command/Option | Example | Description |
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| docker volume create | docker volume create my_volume | Create a new volume |
| docker volume ls | docker volume ls | List all volumes |
| docker volume rm | docker volume rm my_volume | Remove a volume |
Working with Docker Networks
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| Command/Option | Example | Description |
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| docker network create | docker network create my_network | Create a new network |
| docker network ls | docker network ls | List all networks |
| docker network rm | docker network rm my_network | Remove a network |
Docker Compose
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| Command/Option | Example | Description |
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| docker-compose up | docker-compose up | Build, (re)create, start, and attach to containers for a service |
| docker-compose down | docker-compose down | Stop and remove containers, networks, images, and volumes |
| docker-compose build | docker-compose build | Build or rebuild services |
| docker-compose logs | docker-compose logs | View output from containers |
Docker Swarm
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| Command/Option | Example | Description |
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| docker swarm init | docker swarm init | Initialize a swarm |
| docker swarm join | docker swarm join --token <token> <manager_ip> | Join a node to a swarm |
| docker service create | docker service create --name my_service nginx | Create a service |
| docker service ls | docker service ls | List services in a swarm |
| docker node ls | docker node ls | List nodes in a swarm |
Dockerfile
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| Command/Option | Example | Description |
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| FROM | FROM ubuntu:latest | Set the base image for subsequent instructions |
| RUN | RUN apt-get update && apt-get install -y python3 | Execute commands in a new layer on top of the current image |
| CMD | CMD ["python3", "app.py"] | Provide defaults for an executing container |
| COPY | COPY . /app | Copy files from the host to the container |
| EXPOSE | EXPOSE 80 | Inform Docker that the container listens on the specified network ports at runtime |
This cheatsheet covers the most commonly used Docker commands and options, helping you to manage Docker images, containers, volumes, networks, and services effectively.