I am running raspberry pi v3 and ran apt-get update and upgrade commands to get upto date. It also ended up updating the kernel i think. I should have paid more attention to what all was getting updated.

After the update wireguard was not running and upon debugging i found that the wireguard kernel module was no longer present. So i uninstalled all wireguard packages and installed them again and the module showed up and on reboot system was back to normal. What i was curious was how should one go about doing os/kernel updates in future in order to avoid this issue?

I am running

Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux