# Software Updates

{% hint style="info" %}
Sentinel applications are backwards compatible. Updates between versions shall not exceed one (1) year to ensure continued functionality, security, and compatibility with supported platforms.
{% endhint %}

#### Download the Sentinel application package to your folder, using your email and password:

```shell
cd /home/user/Downloads/

wget --ask-password https://data.sentinelsoftware.com/releases/sentinel-21.x.x.jar \
--user=<user-email>
```

#### **Copy the Sentinel server file to the installation folder. opt/sentinel/  :**&#x20;

```shell
cp /home/user/Downloads/sentinel-21.x.x.jar /opt/sentinel/
```

#### **Create a SYMLINK to the new package:**&#x20;

```shell
ln -sf sentinel-21.x.x.jar sentinel.jar
```

#### **Restart related Sentinel service:** &#x20;

```shell
systemctl restart sentinel
```

#### **Restart NGINX service:**&#x20;

```shell
systemctl restart nginx
```

#### **Using a Chrome browser (require), enter the Sentinel domain to load the application.** &#x20;


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://help.sentinelsoftware.com/sentinel-help-center/installation-and-updates/software-updates.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.