> For the complete documentation index, see [llms.txt](https://docs.datarhei.com/restreamer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datarhei.com/restreamer/knowledge-base/faq/what-are-environment-variables.md).

# What are environment variables?

With environment variables, you can control the default behavior of the Restreamer.

As part of [datarhei Core](broken://pages/sadroh2PKIjNwWZ8ICF1), you can find documentation for the various environments on GitHub.

{% embed url="<https://github.com/datarhei/core>" %}
**External URL:** List with all environment variables on GitHub
{% endembed %}

![Fig. 1: Example environment variables with locked fields are marked with ENV](https://304400748-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MS3qj4cW170AMeE1ckj-1703796690%2Fuploads%2FANO6pc78fpR5ywG6icNS%2Fenv-demo.png?alt=media\&token=c8aeef4f-3125-405a-911d-50b3d3288b76)

## Learn more

{% content-ref url="/pages/Os2NcMmPtTG6sKqCztmb" %}
[Why do I see ENV and cannot select anything?](/restreamer/knowledge-base/troubleshooting/why-do-i-see-env-and-cannot-select-anything.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MYd\_eWFK56LZQkA-iAN" %}
[User Guides](/restreamer/knowledge-base/user-guides.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MXb\_m72sKwXpgM5udfT" %}
[Knowledge Base](/restreamer/knowledge-base/manual.md)
{% endcontent-ref %}