How to remove system upgrade notification ("Fedora 27 Now Available") ?
At startup, I have the following notification in GNOME Shell :
Software Upgrade Available
A new version of Fedora is available to install
Same thing in GNOME Software :
Fedora 27 Now Available
A major upgrade, with new features and added polish.
Is it possible to disable these notifications ?
(I wan't to avoid that a friend upgrades the system on his computer)
Update: same issue for Fedora 27 -> 28 upgrade...