Allegedly, on or about 12 December 2018, home user via users sent:
Something keeps trying to do automated updates, but I have not been
able to figure out what, or how to shut it off.
When you log into a GUI session, the GUI can fire off things as you log
in. In MATE, there's a "mate-session-properties" tool to control these
things. Gnome has something similar (slight name change to the
command). KDE, likewise. Similar for other desktops.
In my mate-session-properties I see a "dnfdragora-updater" entry was
pre-installed. I un-ticked that to stop it looking for updates. Like
you, I do updates when I want them to happen.
And I'm subscribed to the "updates" mailing lists, which gives me far
more information about updated packages than the GUI tool does. I also
get to hear about packages that I haven't installed (that can be a
blessing and a curse). The update info is in my mail, where I can read
it when I want to, rather than some GUI tool interrupting me with
alerts.
--
[tim@localhost ~]$ uname -rsvp
Linux 4.16.11-100.fc26.x86_64 #1 SMP Tue May 22 20:02:12 UTC 2018 x86_64
Boilerplate: All mail to my mailbox is automatically deleted.
There is no point trying to privately email me, I only get to see
the messages posted to the mailing list.
Using Windows software is like coating all your handtools with sewage.