# Release v0.1.19-b - Cassini Testnet

### Update Deadline <a href="#geng-xin-jie-zhi-shi-jian" id="geng-xin-jie-zhi-shi-jian"></a>

Please complete this update <mark style="background-color:red;">**before 12:00 PM UTC, July 24, 2024**</mark><mark style="background-color:red;">.</mark>

### **Update Guide** <a href="#geng-xin-zhi-nan" id="geng-xin-zhi-nan"></a>

#### **1. Remove the old version**

Remove the old version before downloading the new version.

```
rm $(which titan-l1-guardian)
```

#### 2. Download the latest version

Visit the following url to download the latest version of Titan Guardian software:

```
https://github.com/Titannet-dao/titan-node/releases/download/v0.1.19-b/titan-l1-guardian
```

#### 3. Move to the system directory and update the permissions

Move it to the system directory and ensure it has proper permissions

```
mv titan-l1-guardian /usr/local/bin/
chmod 0755 /usr/local/bin/titan-l1-guardian
```

*Note: If you have set the proper execute permission, you may skip this step.*

#### 4. Start the new version

Start the new software.&#x20;

**Important Notes:**

* <mark style="color:red;">**Restart the node**</mark>: The new settings will take effect after updating and restarting the node.
* <mark style="color:red;">**Verify the upgrade**</mark>: Run the following command to confirm the update was successful:

  ```
  titan-l1-guardian -v
  ```

<figure><img src="https://titannet.gitbook.io/~gitbook/image?url=https%3A%2F%2F3822791205-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FrZQtAKIIsvAQP0E9RumD%252Fuploads%252F0XLZgALDa2p6ywHrisq4%252Fimage.png%3Falt%3Dmedia%26token%3Df4c0f389-c13d-400e-a8eb-15bc1b51f4f6&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=c9fdc1d8&#x26;sv=1" alt=""><figcaption><p>If the version information is displayed as shown, the upgrade was successful. ✅</p></figcaption></figure>

* <mark style="color:red;">**Forced Offline Warning**</mark><mark style="color:red;">: Nodes that fail to update on time will be automatically taken offline.</mark>

Please follow the steps above to ensure a smooth update of your system, maintaining the stability and security of the Titan network. We appreciate your continued support and cooperation.