FOSS gamedev and creative worlds

Hello!
I just installed minetest server using this tutorial:
http://wiki.minetest.com/wiki/Setting_up_a_server/Ubuntu
After install got to /root/minetest, but there was only world and debug. I would like to know where I can get "minetestserver" file or just minetest file so I can move that file to another directory, becouse I need multiple servers.
Thanks!

You have to compile the source code to get the binaries.

PS: do not run a server as root, run it as an unprivilegied user.