> For the complete documentation index, see [llms.txt](https://docs.recognito.vision/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.recognito.vision/face-liveness-detection-sdk/integration-guide/linux/licensing.md).

# Licensing

{% hint style="info" %}
Click [Here ](/license-option.md)to get details about RECOGNITO license option

[License Option](/license-option.md)
{% endhint %}

## Get your HWID (Hardware ID)

To activate SDK, you have to first get your Hardware ID by using the [get\_deviceid ](/face-liveness-detection-sdk/integration-guide/linux/api-reference.md#get_device_id)function.

<figure><img src="/files/0XiLVXc1Va6kD3QBrhsz" alt=""><figcaption></figcaption></figure>

## Request License

After getting HWID, share it with us for license key.

[**Contact us**](/contact-and-support.md)

## Activate SDK

[Initializes ](/face-liveness-detection-sdk/integration-guide/linux/api-reference.md#init_sdk_offline)the SDK with license key. Should be called before using of any other functions.

{% code overflow="wrap" %}

```python
init_sdk_offline("engine/bin", "license.txt")
```

{% endcode %}