🐋 Docker Quick Reference Cheat Sheet

A comprehensive guide to Docker commands for building, managing, and orchestrating containers.

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📌 Table of Contents

• 🚀 Build Commands
• 🧹 Clean Up Commands
• 💻 Container Interaction
• 🔍 Container Inspection
• 🖼️ Image Management
• ⚙️ Docker Run Flags
• 🔑 Registry Commands
• 🌐 Network & Volumes
• 🐝 Docker Swarm & Services
• 📁 Filesystem & Environment
• 🐙 Docker Compose
• 📊 Health & Stats
• 📚 External Resources

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🚀 Build Commands

Used to create images from a Dockerfile.

Command	Description
docker build -t <image_name> .	Build an image from a Dockerfile in the current directory and tag it.
docker build --no-cache -t <image_name> .	Build image without using the cache.
docker build -f <file_name> -t <image_name> .	Build image using a specified Dockerfile.

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🧹 Clean Up Commands

Keep your system lean by removing unused resources.

• docker system prune: Remove all unused Docker resources (containers, images, networks, volumes).
• docker container prune: Remove all stopped containers.
• docker image prune: Remove unused images.
• docker volume prune: Remove unused volumes.
• docker network prune: Remove unused networks.

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💻 Container Interaction

Manage the lifecycle of your containers.

• docker run <image_name>: Run a Docker image as a container.
• docker start <container_id>: Start a stopped container.
• docker stop <container_id>: Stop a running container.
• docker restart <container_id>: Restart a running container.
• docker exec -it <container_id> <command>: Execute a command inside a running container interactively.

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🔍 Container Inspection

Monitor and debug container status.

• docker ps: List running containers.
• docker ps -a: List all containers, including stopped ones.
• docker logs <container_id>: Fetch the logs of a specific container.
• docker inspect <container_id>: Inspect detailed information about a container.

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🖼️ Image Management

Handle images locally and interact with registries.

• docker images: List available Docker images.
• docker pull <image_name>: Pull a Docker image from a registry.
• docker push <image_name>: Push a Docker image to a registry.
• docker rmi <image_id>: Remove a Docker image.

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⚙️ Docker Run Flags

Common options used with the docker run command.

• docker run -d <image_name>: Run in detached mode (background).
• docker run -p <host_port>:<container_port> <image_name>: Publish container ports to the host.
• docker run -v <host_path>:<container_path> <image_name>: Mount a host directory or volume.
• docker run --name <container_name> <image_name>: Assign a custom name to the container.

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🔑 Registry Commands

Manage your connection to Docker Hub or private registries.

• docker login: Log in to a Docker registry.
• docker logout: Log out from a Docker registry.
• docker search <term>: Search for Docker images in a registry.
• docker pull <registry>/<image_name>: Pull from a specific registry.

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🌐 Network & Volumes

Persistence and communication settings.

Networks

• docker network create <network_name>: Create a Docker network.
• docker network ls: List available Docker networks.
• docker network inspect <network_name>: View detailed network info.
• docker network connect <network_name> <container_name>: Connect a container to a network.

Volumes

• docker volume create <volume_name>: Create a Docker volume.
• docker volume ls: List available Docker volumes.
• docker volume inspect <volume_name>: View detailed volume info.
• docker volume rm <volume_name>: Remove a Docker volume.

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🐝 Docker Swarm & Services

Commands for orchestration and scaling.

• docker swarm init: Initialize a swarm on the current node.
• docker swarm join: Join a swarm as a worker node.
• docker node ls: List nodes in the swarm.
• docker service create --name <name> <image>: Create a service.
• docker service ls: List running services.
• docker service scale <name>=<replicas>: Scale service replicas.
• docker service logs <name>: View service logs.

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📁 Filesystem & Environment

Managing data and variables.

• docker cp <container_id>:<path> <host_path>: Copy files from container to host.
• docker cp <host_path> <container_id>:<path>: Copy files from host to container.
• docker run -e <VAR>=<VALUE> <image>: Set environment variables.

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🐙 Docker Compose

Manage multi-container applications easily.

docker-compose up      # Create and start containers
docker-compose down    # Stop and remove containers
docker-compose ps      # List containers

📊 Health & Stats

Monitor and manage the health and performance of your containers in real-time.

• HEALTHCHECK instruction: Define a command in your Dockerfile to let Docker know how to check if the container is still "healthy."
• docker container inspect --format='{{json .State.Health}}' <container_name>: Retrieve the detailed health status of a specific container in JSON format.
• docker stats: Display a live, continuous stream of resource usage statistics (CPU, Memory, Network I/O) for all running containers.
• docker stats <container_name>: Display the live resource usage for a specific container by name or ID.

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📚 External Resources

For more in-depth learning, advanced configurations, and the latest updates, check out these curated resources:

• Coursera Docker Cheat Sheet Collection: A professional collection of guides and visual cheat sheets for mastering Docker.
• Official Docker Documentation: The primary source for all Docker features and installation guides.

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Tip

Use docker stats --no-stream if you want a single snapshot of resource usage rather than a live feed. docker-compose logs # View logs