Multiplayer and savegames?

[Multiplayer and savegames?]

Sorry for grab this thread out, but i have some questions ;

- How can i "write" this commands into the dedicated server box? I'm new at this, but .. I don't even know how to to any command on my dedicated server..

- I don't understand the whole concept.. U can stop the server with a command and then close the whole application? Then restart the server and resume it, or what?

Thanks alot

Edit 1: And i don't even know what i have to put where.. >.<