Docker Basic Commands

Managing Images

List Downloaded Images
```
docker images
```
- Displays all locally stored images with details like size and tags.
Remove an Image
```
docker image rm <image_name/id> -f
```
- -f: Force deletion (even if the image is in use).
- Remove all images:
```
docker rmi $(docker images -q)
```

Build an Image from a Dockerfile

docker build -t <image_name>:<image_version> <path_to_dockerfile>

Example:
```
docker build -t myapp:v1.3.17 .
```

Managing Containers

List Containers
- Running containers:
```
docker ps
```
- All containers (running/stopped):
```
docker ps -a
```

Run a Container

docker run [options] <image>

Common flags:

-d  # Run in detached mode
-p 8080:80  # Map host port to container port
-v /host/path:/container/path  # Mount a volume
-e ENV_VAR=value  # Set environment variable
--name <container_name>  # Assign a custom name

Lifecycle Management
- Start a stopped container:
```
docker start <container>
```
- Stop a running container:
```
docker stop <container>
```
- Restart a container:
```
docker restart <container>
```
- Delete a container:
```
docker rm <container>
```
- Remove all stopped containers:
```
docker container prune
```
Interact with Containers
- View logs:
```
docker logs <container>
```
- Access a running container (interactive shell):
```
docker exec -it <container> /bin/bash
```
- Monitor resource usage:
```
docker stats
```

Advanced Operations

Volume Management

List volumes:
```
docker volume ls
```
Create a volume:
```
docker volume create <volume_name>
```

Network Management

List networks:
```
docker network ls
```

Connect a container to a network:

docker network connect <network> <container>

Inspect Details
- View detailed metadata:
```
docker inspect <container/image>
```

Pro Tips

Clean Unused Resources
```
docker system prune -a
```
- Removes all stopped containers, unused images, and networks.
Real-Time Log Streaming
```
docker logs -f <container>
```
- -f: Follow logs in real-time (similar to tail -f).

Copy Files Between Host and Container

docker cp <container>:<path> <host_path>  # Copy from container
docker cp <host_path> <container>:<path>  # Copy to container

Save/Load Images as Files

Export an image:
```
docker save -o <file.tar> <image>
```
Import an image:
```
docker load -i <file.tar>
```