ProNotes

To disable automatic updates on Ubuntu, you can modify the settings for the unattended-upgrades service, which handles automatic updates. Below are the steps to disable it:

 apt remove update-manager 

### Method 1: Disable Automatic Updates via Configuration
1. **Edit the unattended-upgrades configuration file**:
   Open a terminal and edit the configuration file with a text editor like `nano`:
   ```bash
   sudo nano /etc/apt/apt.conf.d/20auto-upgrades
   ```

2. **Modify the settings**:
   Look for the following lines (or similar):
   ```bash
   APT::Periodic::Update-Package-Lists "1";
   APT::Periodic::Unattended-Upgrade "1";
   ```
   Change the values to `0` to disable automatic updates:
   ```bash
   APT::Periodic::Update-Package-Lists "0";
   APT::Periodic::Unattended-Upgrade "0";
   ```

3. **Save and exit**:
   Press `Ctrl+O`, then `Enter` to save, and `Ctrl+X` to exit.

4. **Stop and disable the unattended-upgrades service**:
   Run the following commands to stop the service and prevent it from starting on boot:
   ```bash
   sudo systemctl stop unattended-upgrades
   sudo systemctl disable unattended-upgrades
   ```

### Method 2: Disable via Software & Updates GUI
1. **Open Software & Updates**:
   Search for "Software & Updates" in the Ubuntu application menu and open it.

2. **Go to the Updates tab**:
   In the "Software & Updates" window, navigate to the **Updates** tab.

3. **Disable automatic updates**:
   - Set the **Automatically check for updates** dropdown to **Never**.
   - Uncheck any options related to automatic updates (e.g., security updates or other updates).

4. **Apply changes**:
   Click **OK** or **Close** to save the settings. You may need to enter your password.

### Method 3: Completely Remove Unattended-Upgrades
If you want to remove the unattended-upgrades package entirely:
1. **Uninstall the package**:
   ```bash
   sudo apt remove --purge unattended-upgrades
   ```
2. **Clean up residual files**:
   ```bash
   sudo apt autoremove
   ```

### Verify Automatic Updates Are Disabled
To confirm that automatic updates are disabled:
- Check the status of the unattended-upgrades service:
  ```bash
  systemctl status unattended-upgrades
  ```
  It should show as **inactive** or **disabled**.

### Notes
- Disabling automatic updates means you’ll need to manually check for and install updates using `sudo apt update && sudo apt upgrade` to keep your system secure.
- If you only want to disable specific types of updates (e.g., non-security updates), you can fine-tune the settings in `/etc/apt/apt.conf.d/50unattended-upgrades` instead of disabling everything.