What is V-CoreOS
V-CoreOS is a preconfigured software package for the Rat Rig V-Core 3, that aims to make it as painless as possible to get Klipper, Fluidd and Moonraker up and running on your printer. It is developed and maintained by Mikkel Schmidt (miklschmidt#2036 on the Rat Rig Unofficial Discord).
How to use V-CoreOS
Start by reading the Documentation