# Docker

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Docker is a platform to containerize OS's and all necessary dependencies. It is a way to package applications, and the associated dependencies into a single unit called an *image*. This image can then be shared and run as a container, either locally as a developer or remotely on a production server.

{% hint style="info" %}
Container: An isolated environment for running an application. It is lightweight, starts quickly, uses the OS of the host, and runs multiple applications in isolation.
{% endhint %}

Commands:

* Get version: `docker version`
* Build docker image: `docker build -t $IMAGENAME`
* Pull docker repo: `docker pull $URL`
* Run image in container: `docker run $IMAGENAME`
* Create debian interactive container: `docker run -it debian`