> For the complete documentation index, see [llms.txt](https://cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookbook.denovolab.com/installation/distributed-architecture/web-ui/dnl_web_helper.md).

# dnl\_web\_helper

Each Web server must have dnl\_web helper installed.  The dnl\_web\_helper is responsible for all the asynchronous jobs for the User Interface. 

You can start the dnl\_web\_helper with the following command:

```
systemctl start dnl_web_helper
```

{% hint style="info" %}
The dnl web help should be installer in the same server where the web server ( NGINX) is running on.
{% endhint %}