# Update Guide
### Table of Contents
1. [Prerequisites](#prerequisites)
2. [Stop the `znnd` Service](#stop-the-znnd-service)
3. [Download the Latest `znn-controller`](#download-the-latest-znn-controller)
4. [Replace the Existing `znn-controller` File](#replace-the-existing-znn-controller-file)
5. [Deploy the Updated Controller](#deploy-the-updated-controller)
6. [Verify the Update](#verify-the-update)
***
### 1) Prerequisites
Before proceeding with the update, ensure you have the following:
* **Access Credentials**: SSH access to your server with sudo privileges.
* **Basic Knowledge**: Familiarity with command-line interfaces and server management.
* **Backup**: It's recommended to back up your current configuration and controller files before performing the update.
***
### 2) Stop the `znnd` Service
1. **Access Your Server via SSH**:
Open your terminal and connect to your server using SSH:
ssh username@your_server_ip
\
\
Replace `username` with your server's username (commonly `root`) and `your_server_ip` with your server's IP address.\
2. **Stop the `znnd` Service**:
Run the `znn-controller` executable and select the option to `Stop Service` the `znnd` service.
```bash
./znn-controller
```
* **Interactive Prompt**:
```mathematica
1) Deploy
2) Status
3) Start service
4) Stop service
5) Resync
6) Help
7) Quit
Select an option from the ones listed above
```
* **Action**:
* Enter `4` and press `Enter` to stop the running the `znnd` service.
\
**Note**: Ensure the service has completely stopped before proceeding to the next step. You can enter `2` and press `Enter` to verify the Status of the `znnd` service.
***
### 3) Download the Latest `znn-controller`
1. **Identify the Latest Release URL**:
Visit the [Zenon Network GitHub Repository](https://github.com/zenon-network/znn_controller_dart/releases) to find the latest version of the `znn-controller`. Copy the download URL for the x86/64 Linux release.\
2. **Download the Latest Controller**:
Replace `YOUR_LATEST_URL` with the actual URL of the latest `znn-controller` release.
```bash
wget -O znn_controller-linux-x86_64.zip YOUR_LATEST_URL
```
\
**Example**:
```bash
wget -O znn_controller-linux-x86_64.zip https://github.com/zenon-network/znn_controller_dart/releases/download/v0.0.5-beta/znn_controller-linux-x86_64.zip
```
***
### 4) Replace the Existing `znn-controller` File
* **Extract the Downloaded ZIP File**:
```bash
unzip -o znn_controller-linux-x86_64.zip
```
* **`-o` Flag**: Overwrites existing files without prompting.\
* **Remove the ZIP File**:
```bash
rm znn_controller-linux-x86_64.zip
```
***
### 5) Deploy the Updated Controller
* **Run the Updated `znn-controller`**:
```bash
./znn-controller
```
* **Deployment Options**:
Upon execution, you will be presented with deployment options:
```mathematica
1) Deploy
2) Status
3) Start service
4) Stop service
5) Resync
6) Help
7) Quit
Select an option from the ones listed above
```
* **Select Deploy Option**:
* **Action**: Enter `1` and press `Enter` to deploy the updated controller.
* **Continue Using Existing Configuration**:
* **Prompt**:
```mathematica
Continue using the existing configuration? (Y/N):
```
* **Action**: Enter `Y` and press `Enter` to confirm.
***
### 6) Verify the Update
* **Check the Status of the Controller**:
Run the `znn-controller` and select the status option to verify that the update was successful.
```bash
./znn-controller
```
* **Interactive Prompt**:
```mathematica
1) Deploy
2) Status
3) Start service
4) Stop service
5) Resync
6) Help
7) Quit
Select an option from the ones listed above
```
* **Action**: Enter `2` and press `Enter` to view the current status.
---
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