Hello Toris,
Is there any way to set the max players of my own server to two?
I just want to do some trainings with a friend, but always some other person is joining the Server, which is really annoying.

I hope you can help me.

/se mc 2

EDIT: Alternatively, you can just type
/passwd password
so that there'll be a password in your server. This makes you able to allow only certain people in your server.
People have to type
/pass password
to get in your server.

Thank you very much!