# Docker Concepts

DockerHub : Public Repository for Container

**Containers:** Layers of Image, Application Image on top.

Container is binded to a port.

**Images** : Artifact lying around, not running. Docker Images downloaded from Docker Hub.

## Docker Basic Commands

**Docker PS** : Show Running Containers

**Docker run -d** : Run Container in detached Mode.

**docker stop Use id of container**

**docker start**

**docker ps -a** : Show all containers which are running/not running.