> For the complete documentation index, see [llms.txt](https://docs.orbs.network/v2-contract-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.orbs.network/v2-contract-sdk/gamma-in-depth/gamma-server-under-the-hood.md).

# Gamma server under the hood

This page is for informational purposes only for advanced users. These technical details are abstracted away from developers by Gamma CLI.

Gamma server runs under the hood on [Docker](https://www.docker.com/). Docker is a platform that performs operating-system-level virtualization, also known as "containerization".

## Docker image for Gamma

You can print docker images that are available on your machine using the docker CLI

```
docker images
```

If you've installed Gamma CLI successfully, you should see among the results something similar to

```
REPOSITORY          TAG                      IMAGE ID            CREATED             SIZE
orbsnetwork/gamma   v0.8.0                   61057f923f89        2 weeks ago         426MB
```

Gamma CLI downloads this image automatically from [Docker Hub](https://hub.docker.com/) with `docker pull`

## Running the docker image

When Gamma CLI is starting Gamma server, under the hood it's running

```
docker run -d --name orbs-gamma-server orbsnetwork/gamma
```

When Gamma CLI stops Gamma server, under the hood it's running

```
docker stop orbs-gamma-server
docker rm -f orbs-gamma-server
```

You can check if a docker container is currently running with

```
docker ps
```

And if it is, you can examine the logs of the container with

```
docker logs -f orbs-gamma-server
```