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
  • DasFaultier@sh.itjust.works
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    5 hours ago

    This is the way! At least install security upgrades nightly using unattended-upgrades and reboot from time to time to get the latest Kernel version.