Client version

[xoft]

From what I can understand from your text, I think you haven't configured MCServer properly. All in-game commands are provided by plugins, so if you didn't enable any plugins, there are no commands. The Core plugin, which comes with the server out of the box, provides the very usual commands, including help. To enable it, you need to include it in the settings.ini file. Have a look at the MCServer wiki for details on server setup:
http://www.mc-server.org/wiki/doku.php?id=configure
http://www.mc-server.org/wiki/doku.php?i...ll:plugins