If anything you must use the web ui to copy to live server files, the profiles directory is owned/protected by root on purpose as a security measure preventing tampering by normal regular users as there’s generally very little to no need to ever manually touch anything in that directory.
EDIT: You may also take a look at this (skipping over to the “Using MineOS” parts/portions of the video): [Tutorial] Installing/Using/Configuring MineOS-Node on a Ubuntu/Debian based distribution with a GUI (WiFi included, covers a range of some basics)