> For the complete documentation index, see [llms.txt](https://42-guide.gitbook.io/42-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://42-guide.gitbook.io/42-guide/docker/docker-commands.md).

# Docker Commands

### 🚀 Docker Commands Cheat Sheet

### 1️⃣ Docker Version & Info

```sh
docker --version          # Show Docker version
docker info               # Display system-wide Docker information
```

### 2️⃣ Working with Docker Images

```sh
docker images             # List all downloaded images
docker image -ls          # List all downloaded images
docker pull <image>       # Download an image from Docker Hub
docker build -t <name> .  # Build an image from a Dockerfile (in the current directory)
docker rmi <image_id>     # Remove an image
docker tag <image> <repo>:<tag>  # Tag an image for pushing to a repository
docker push <repo>:<tag>  # Push an image to Docker Hub
```

### 3️⃣ Managing Docker Containers

```sh
docker ps                 # List running containers
docker ps -a              # List all containers (including stopped ones)
docker run <image>        # Run a container from an image
docker run -d <image>     # Run a container in detached (background) mode
docker run --name <name> <image>  # Run container with a custom name
docker start <container>  # Start a stopped container
docker stop <container>   # Stop a running container
docker restart <container> # Restart a container
docker rm <container>     # Remove a container
docker logs <container>   # Show logs of a running container
docker inspect <container> # Get detailed information about a container
docker exec -it <container> bash  # Access container shell (if bash is available)
docker attach <container> # Attach terminal to a running container
```

### 4️⃣ Exposing Ports & Volumes

```sh
docker run -p 8080:80 <image>    # Map container port 80 to host 8080
docker run -v /host/path:/container/path <image>  # Mount a volume
docker volume ls                 # List all volumes
docker volume create <name>       # Create a named volume
docker volume rm <name>           # Remove a volume
```

### 5️⃣ Docker Networking

```sh
docker network ls                 # List networks
docker network create <name>       # Create a custom network
docker network connect <network> <container>  # Connect a container to a network
docker network inspect <network>   # Show network details
docker network rm <name>           # Remove a network
```

### 6️⃣ Docker Compose (Multi-Container Applications)

```sh
docker-compose up                 # Start all services defined in docker-compose.yml
docker-compose up -d              # Start services in detached mode (background)
docker-compose down               # Stop and remove all services
docker-compose ps                 # List running services
docker-compose logs                # View logs of all services
```

### 7️⃣ Managing Docker System & Cleanup

```sh
docker system prune -a             # Remove all unused containers, networks, images, and caches
docker container prune             # Remove all stopped containers
docker image prune -a              # Remove all unused images
docker volume prune                # Remove all unused volumes
```

### 8️⃣ Saving & Loading Docker Images

```sh
docker save -o <file.tar> <image>  # Save an image as a .tar file
docker load -i <file.tar>          # Load an image from a .tar file
docker export -o <file.tar> <container>  # Export a container as a .tar file
docker import <file.tar>           # Import a saved container as an image
```

### 9️⃣ Docker Container Resource Limits

```sh
docker run --memory=512m <image>   # Limit container memory to 512MB
docker run --cpus=1.5 <image>      # Limit container to 1.5 CPU cores
```

### 🔟 Debugging & Monitoring Containers

```sh
docker stats                        # Show live resource usage of containers
docker top <container>               # Show running processes inside a container
docker diff <container>               # Show file changes inside a container
docker events                         # Stream real-time Docker events
```

**This Markdown file provides \*\*all key Docker commands\*\* categorized for easy reference. 🚀 Let me know if you need further details!**


---

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