Or asked the other way around: How long do you keep your servers running without installing any software updates?

update means something like

sudo dnf update

or something ....

apt-get upgrade
apt-get update
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I SSH in and run an update manually, once a week.

I'm not knowledgable and comfortable enough to let updates happen automatically and feel like I could trust it to keep running. Not yet, anyway.

Edit: But at some point I might do what another commenter said and make sure security updates run automatically and check other updates weekly.

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