18.04.6 upgrade disable

 In Ubuntu 18.04.6, you can disable the “Upgrade Available” popup/message in a few ways.

Method 1 — Disable Release Upgrade Notifications (Recommended)

Open Terminal and run:

sudo nano /etc/update-manager/release-upgrades

Find this line:

Prompt=lts

Change it to:

Prompt=never

Save and exit:

• Press CTRL + O → Enter

• Press CTRL + X

Then restart update-manager:

sudo systemctl restart unattended-upgrades

or simply reboot.

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Method 2 — Disable Update Notifier Popups

Run:

gsettings set com.ubuntu.update-notifier no-show-notifications true

This hides desktop notification popups.

To enable again later:

gsettings set com.ubuntu.update-notifier no-show-notifications false

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Method 3 — Disable GUI Update Checks Completely

Go to:

Software & Updates → Updates

Change:

• “Automatically check for updates” → Never

• “Notify me of a new Ubuntu version” → Never

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Method 4 — Remove Update Notifier Package (Permanent)

If you never want upgrade popup messages:

sudo apt remove update-notifier update-manager

But this also removes graphical update management tools.

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Verify Current Setting

Check:

cat /etc/update-manager/release-upgrades

You should see:

Prompt=never

This will stop messages like:

New release '20.04 LTS' available
Run 'do-release-upgrade'