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:

   sudo nano /etc/apt/apt.conf.d/20auto-upgrades

2. Modify the settings:
Look for the following lines (or similar):

   APT::Periodic::Update-Package-Lists "1";
   APT::Periodic::Unattended-Upgrade "1";

Change the values to 0 to disable automatic updates:

   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:

   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:

   sudo apt remove --purge unattended-upgrades

2. Clean up residual files:

   sudo apt autoremove

Verify Automatic Updates Are Disabled

To confirm that automatic updates are disabled:

• Check the status of the unattended-upgrades service:

  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.

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