> For the complete documentation index, see [llms.txt](https://docs.aethir.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aethir.com/checker-nodes-explained/how-to-run-checker-node/how-to-install-and-update-checker-client.md).

# How to Install & Update Checker Client

{% hint style="warning" %}
This is an archived page. For the latest information, refer to the [checker guide](/checker-guide.md).
{% endhint %}

Please note that you cannot run multiple Linux CLI or Windows GUI in one machine, as that would lead to unexpected error.

#### **Linux CLI**

**Download and Install**

1. Download from [app.aethir.com](http://app.aethir.com)
2. Unzip
3. <mark style="color:red;">`cd`</mark> into the directory
4. <mark style="color:red;">`sudo ./install.sh`</mark>
5. <mark style="color:red;">`sudo ./AethirCheckerCLI`</mark>

**Update**

* Non-mandatory update: <mark style="color:red;">`aethir update`</mark>
* Mandatory update: will be updated automatically with a prompt `Your curent version is below the minimum required version. The program will be closing shortly to complete the version update. Please restart later to use.`

Note: Manual reinstallation is required for updating from v1.0.2.4 or below. Please uninstall your checker client and manually install the latest version.

#### **Windows GUI**

**Download and Install**

1. Download and install the **Checker Client GUI** application from [app.aethir.com](http://app.aethir.com)

**Update**

* **Automatic update**: Versions after v1.0.2.4 will update automatically once detecting a new version.

  <figure><img src="/files/kPZrENnFevgaVvnFvABV" alt=""><figcaption><p><strong>Checker Client GUI - Automatic Update</strong></p></figcaption></figure>
* **Manual update**: Alternatively, you can uninstall your checker client and manually install the latest version from [app.aethir.com](http://app.aethir.com).