OPTION 2: IF you are using Ubuntu go to a terminal, cd to this directory,
then switch user to the one that will run minetestserver
(since install-chunkymap-on-ubuntu.sh DOES replace "/home/owner" with current user's home [replace-with-current-user.py, which is automatically called by install, will change /home/owner to current user's directory in each script that install copies to $HOME/chunkymap])