> For the complete documentation index, see [llms.txt](https://docs.auterion.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.auterion.com/~/changes/TDRfjBXXgHmxK48cWqay/release-notes/auterionos/aos-for-skynode/aos-2.5/aos-2.5.7.md).

# AOS 2.5.7

## Compatibility

This version of AuterionOS comes bundled with APX4 2.5.7:

{% content-ref url="/pages/mU3REoM0Th1Sxc7XxdWx" %}
[APX4 2.5.7](/~/changes/TDRfjBXXgHmxK48cWqay/release-notes/flight-control/apx4-2.5/apx4-2.5.7.md)
{% endcontent-ref %}

Please use Auterion Mission Control 1.14.6 or newer with this version of AOS:

{% content-ref url="/pages/6gent0PLKRkVHkHCsHDB" %}
[AMC 1.14.6](/~/changes/TDRfjBXXgHmxK48cWqay/release-notes/auterion-mission-control-release-notes/amc-1.14/amc-1.14.6.md)
{% endcontent-ref %}

## What improved <a href="#what-improved.1" id="what-improved.1"></a>

* Set trillium video destination using an env variable
* On trillium stop looking for the tracking board after a timeout

## Resolved Issues <a href="#bug-fixes.1" id="bug-fixes.1"></a>

* Multiple fixes to harden linux security

### &#x20;<a href="#apx4" id="apx4"></a>