RasPi4 dev version

[gkusiak]

...setting root password and ssh-ing in to the backend wasn't as daunting as I thought

From another thread/topic here, is this the way to revert back to 18.5?
sudo apt-get install --reinstall xbian-package-firmware

also, since I'm still learning this language called linux (or debian?), will the instructions to get my Pimoroni fan shim to cycle shown
https://learn.pimoroni.com/tutorial/sandyj/getting-started-with-fan-shim
work?

I'm still on the hunt to find the video cache settings file advancedsettings.xml - I can't seem to cd ~/.kodi/userdata/ but I have found /boot/config.txt