Important Docker Commands -

1. Docker Installation and Version

• docker --version – Displays the installed Docker version.
• docker info – Provides detailed information about the Docker installation.

2. Container Management

• docker run <image> – Creates and starts a container from an image.
• docker run -d <image> – Runs a container in detached mode (in the background).
• docker run -it <image> – Runs a container interactively with a terminal.
• docker ps – Lists all running containers.
• docker ps -a – Lists all containers (running and stopped).
• docker stop <container_id> – Stops a running container.
• docker start <container_id> – Starts a stopped container.
• docker restart <container_id> – Restarts a container.
• docker pause <container_id> – Pauses a running container.
• docker unpause <container_id> – Unpauses a paused container.
• docker exec -it <container_id> <command> – Executes a command in a running container (e.g., docker exec -it <container_id> bash).
• docker attach <container_id> – Attaches to a running container.
• docker rm <container_id> – Removes a container.
• docker logs <container_id> – Shows the logs of a container.
• docker inspect <container_id> – Provides detailed information about a container.

3. Image Management

• docker images – Lists all available images on your local machine.
• docker pull <image> – Pulls an image from a Docker registry (e.g., Docker Hub).
• docker build -t <image_name>:<tag> <path> – Builds a Docker image from a Dockerfile.
• docker rmi <image_id> – Removes an image.
• docker tag <image_id> <new_image_name> – Tags an image with a new name.
• docker push <image> – Pushes an image to a Docker registry (e.g., Docker Hub).

4. Networking

• docker network ls – Lists all Docker networks.
• docker network inspect <network_name> – Displays detailed information about a Docker network.
• docker network create <network_name> – Creates a new Docker network.
• docker network connect <network_name> <container_name> – Connects a container to a network.
• docker network disconnect <network_name> <container_name> – Disconnects a container from a network.

5. Volume Management

• docker volume ls – Lists all volumes.
• docker volume create <volume_name> – Creates a new volume.
• docker volume inspect <volume_name> – Displays detailed information about a volume.
• docker volume rm <volume_name> – Removes a volume.

6. Docker Compose

• docker-compose up – Starts all services defined in the docker-compose.yml file.
• docker-compose up -d – Starts all services in detached mode.
• docker-compose down – Stops and removes all containers, networks, and volumes defined in the docker-compose.yml file.
• docker-compose logs – Displays logs for all services.
• docker-compose ps – Lists the status of containers managed by Docker Compose.

7. System Cleanup

• docker system prune – Removes unused data (containers, images, networks, and volumes).
• docker container prune – Removes all stopped containers.
• docker image prune – Removes all unused images.
• docker volume prune – Removes all unused volumes.
• docker network prune – Removes all unused networks.

8. Container and Image Searching

• docker search <image_name> – Searches for images on Docker Hub.

9. Docker Hub Authentication

• docker login – Logs in to Docker Hub.
• docker logout – Logs out from Docker Hub.

10. Docker Info and Performance

• docker stats – Displays real-time statistics for containers.
• docker top <container_id> – Displays the running processes of a container.
• docker diff <container_id> – Shows the changes made to the container's filesystem.

These commands cover a wide range of Docker functionalities and will help with container, image, volume, and network management.