help

1- Type /passwd <your password>

2- Server is now private.

You can create a private server by simply creating a normal server and set password.
Command is given by akmal above.

Here's a more 'in-depth' entry from the FAQ that shows you how to make a private server: http://forum.toribash.com/showthread.php?t=214202

how can i make a new server admin?

/jo Server Name

If you want to make it private type /passwrd Password

do /house <username>