Setting up an OpenVPN server on my Netgate SG-3100 router was a piece of cake thanks to the pfsense GUI, but seting up the Ubuntu client requires sadly still the command line.
sudo apt install smartmontools
sudo smartctl -a /dev/sda
or
cat /sys/block/sda/queue/rotational
I am not sure, but Windows seems to be the only operating system, that wants the computer clock to be set to the local time zone instead of universal standard time (UTC). Maybe that is a relic of the times when Microsoft thought that the internet was not very important for the future of computing. All other operating systems apparently use UTC: MacOS, Android, Linux, BSD, ... However, if you are dual-booting your computer, you can get into trouble. Not all operating systems detect automatically a dual boot install and adjust their behaviour in order to be compatible with Windows.