Disable Ubuntu Update Manager's new version warning

Open the /etc/update-manager/release-upgrades with your favorite text editor, ie:

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

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Change the Prompt= line from Prompt=foo_setting to Prompt=never.

If you want a graphical way of doing it open the Ubuntu Software Center and under Edit > Software Sources > Updates you will find a Notify me of a new Ubuntu version option, from the drop box select Never.

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Or just use sed! We just added this to our setup script to avoid our users from borking their own systems by doing upgrades.

sudo sed -i 's/Prompt=.*/Prompt=never/' /etc/update-manager/release-upgrades

You can also just disable checking altogether by doing apt-get remove ubuntu-release-upgrader-core


To stop Ubuntu nagging you:

nano /etc/update-manager/release-upgrades

change Prompt=normal to Prompt=never

To exit nano

Ctrl-X, Y