Yes, I do system updates ... but no updates "just happen" on my system. I am alerted if there is an update available, but my choice whether to accept it or not. Maybe it's a matter of a different setting somewhere?
TL;DR
This is really fascinating.
I found this particular issue when I was trying out LXD.
So - - to use LXD (a container system) you need to install snapd.
Snapd is where the forced updates were happening.
You could schedule it for once a month but it had to happen.
There was a thread on the forum with some over 500 messages as of some time in early 2020 with various devs asking about how to change and and and.
(I can no longer find this thread on the forum and am not going to spend time to do so about 10 minutes this morning is enough. The guy that started the thread is one of the senior devs for FRR if you know your opensource software.)
The brass was adamant - - - - this is permanent - - - suck it up buttercup etc.
Some of the dev responses were actually quite rude with basically the attitude of ' we know what's best for you '.
What made it even more interesting - - - I had started this on my server (since added a testing system for that too!) was that I just couldn't get rid of the stuff.
I spent quite a few hours trying various things got a cheat sheet from the senior developer and still no joy.
The only way I could actually remove snapd and all of the flotsam that remained after removing lxd and snapd was to reinstall my system.
Now you're going - - - well it couldn't have been that bad.
Well - - - I had done what was initially suggested (this was early LXD 2 days) to stop the upgrades - - - use your firewall to not allow connection to the outside. The real frustrating part then showed up. The software wasn't allowed to update - - - so it forced a system shutdown. It took the third time this happened, the second started me investigating, for me to try and find all the possible things that could be causing my server to shut down.
So maybe ubuntu 'general' doesn't do this. but ubuntu 'canonical' did do this.
So my solution was simple - - - - no more ubuntu - - - EVER!!!!!!!!!!
If you're going to insist on total handholding - - - then there are options NOT connected to ubuntu.
I spent a lot of time on this problem and found some tidbits that pointed to some reasoning for 'canonical's ' thinking.
This all started just after there were a mountain of rumors that 'Shuttleworth' was thinking of floating an IPO partly to capitalize his net worth. He was wanting to increase his liquidity and enter into the big boys league - - - you know - - - where you're a billionaire software entrepreneur.
As you can see - - - given my experiences I am quite adamant that ubuntu is NOT benign and also like M$ - -quite not to be trusted.
I will not continue to post on this topic inside this thread as I believe my position is clear and the whys have been fully explained (this is not just a knee jerk reaction!!!) Hopefully I am allowed to continue to interact with other aspects raised in this same thread.
Thanks for listening!