Docker Cheat Sheet

Getting Started with Docker

1. Check Docker Installation:
   

   docker --version
   
   

Basic Commands

1. Pull an Image from Docker Hub:
   

   docker pull <image-name>
   
   

   Example:
   

   docker pull ubuntu
   
   

2. List Available Images:
   

   docker images
   
   

3. Run a Container:
   

   docker run -it <image-name>
   
   

   Example:
   

   docker run -it ubuntu
   
   

4. Run a Container in Detached Mode:
   

   docker run -d <image-name>
   
   

5. Stop a Running Container:
   

   docker stop <container-id>
   
   

6. Start a Stopped Container:
   

   docker start <container-id>
   
   

7. Remove a Stopped Container:
   

   docker rm <container-id>
   
   

8. Remove an Image:
   

   docker rmi <image-name>
   
   

Managing Containers

1. List Running Containers:
   

   docker ps
   
   

2. List All Containers (including stopped):
   

   docker ps -a
   
   

3. View Container Logs:
   

   docker logs <container-id>
   
   

4. Execute a Command in a Running Container:
   

   docker exec -it <container-id> <command>
   
   

   Example:
   

   docker exec -it <container-id> bash
   
   

5. Inspect a Container:
   

   docker inspect <container-id>
   
   

Networking

1. List Docker Networks:
   

   docker network ls
   
   

2. Create a New Network:
   

   docker network create <network-name>
   
   

3. Connect a Container to a Network:
   

   docker network connect <network-name> <container-id>
   
   

4. Disconnect a Container from a Network:
   

   docker network disconnect <network-name> <container-id>
   
   

Volumes and Data Management

1. Create a Volume:
   

   docker volume create <volume-name>
   
   

2. List Volumes:
   

   docker volume ls
   
   

3. Remove a Volume:
   

   docker volume rm <volume-name>
   
   

4. Mount a Volume to a Container:
   

   docker run -v <volume-name>:<container-path> <image-name>
   
   

Dockerfile and Building Images

1. Create a Dockerfile:
   Basic structure:
   

   FROM <base-image>
   MAINTAINER <your-name>
   COPY <source> <destination>
   RUN <command>
   CMD ["<executable>"]
   
   

2. Build an Image from a Dockerfile:
   

   docker build -t <image-name>:<tag> .
   
   

   Example:
   

   docker build -t myapp:latest .
   
   

3. List Built Images:
   

   docker images
   
   

Advanced Commands

1. Tag an Image:
   

   docker tag <image-id> <new-image-name>:<tag>
   
   

2. Push an Image to Docker Hub:
   

   docker push <image-name>:<tag>
   
   

3. Save an Image to a Tar File:
   

   docker save -o <path-to-output-file> <image-name>
   
   

4. Load an Image from a Tar File:
   

   docker load -i <path-to-input-file>
   
   

5. Docker Compose:

   • Start Services:
     

     docker-compose up
     
     

- **Stop Services**:

    ```bash
    docker-compose down

    ```

1. Scale Services:
   

   docker-compose up --scale <service-name>=<number>
   
   

2. View Running Docker Compose Services:
   

   docker-compose ps
   
   

Useful Docker Commands

1. Remove All Stopped Containers:
   

   docker container prune
   
   

2. Remove Unused Images:
   

   docker image prune
   
   

3. Remove All Unused Data (containers, networks, images):
   

   docker system prune
   
   

4. Get Docker System Information:
   

   docker info