To disable the automatic popup prompt for upgrading the Linux kernel on Ubuntu 22.04, you need to adjust the settings related to the update manager and unattended upgrades. Here’s how you can do it:

  1. Disable Update Manager Notifications
    The update manager is responsible for notifying you about available updates, including kernel updates. You can configure it to stop showing these notifications.

A. Using the GUI
Open Software & Updates:

Go to "Settings" and then "Software & Updates."
Adjust Update Settings:

Navigate to the "Updates" tab.
Under "Automatically check for updates," select "Never."
Under "When there are security updates," you can choose "Display immediately" or "Download automatically" depending on your preference, but this won't affect kernel updates.
Close the Window:

This should stop the update manager from checking for updates and notifying you.
B. Using the Terminal
If you prefer using the terminal, you can edit the configuration files directly:

Edit the Update Manager Configuration:

Open the configuration file in a text editor:
bash 复制代码
sudo nano /etc/apt/apt.conf.d/10periodic
Modify or add the following lines to disable automatic updates:
plaintext 复制代码
APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
Save and Exit:

Save the changes and exit the editor (in nano, press CTRL + X, then Y, and Enter).
2. Disable Unattended Upgrades
Unattended upgrades automatically install updates, including some kernel updates. You can disable it if you don't want this feature.

Disable Unattended Upgrades:

Open the configuration file:
bash 复制代码
sudo nano /etc/apt/apt.conf.d/50unattended-upgrades
Comment out or remove lines related to kernel upgrades. Look for lines in the format:
plaintext 复制代码
Unattended-Upgrade::Allowed-Origins {
...
};
Ensure that kernel upgrades are not specified in this section.
Disable the Service:

Stop and disable the unattended-upgrades service:
bash 复制代码
sudo systemctl stop unattended-upgrades
sudo systemctl disable unattended-upgrades
3. Additional Steps
Check for Other Update Tools:

If you have additional tools like update-notifier installed, you may need to configure them to stop notifications.
Manual Updates:

Remember, by disabling these notifications, you are also responsible for manually checking and installing important security updates.
By following these steps, you should be able to disable the automatic popup prompts for upgrading the Linux kernel on Ubuntu 22.04. Always ensure that your system is secure by performing regular manual updates.