To get an overview of the available options provided by the management script, be sure to have a look at the help page or read the according section on the ArchWiki article [1].

You can quit the console without shutting down the server by press ctrl+a d (first ctrl+a and after releasing the buttons press d). This will detach your input from the server console. The attaching and detaching is done with GNU screen since it lets you view and type into the console, send single commands to it and keep it alive without a connected user. Take a look at the the command overview at the ArchWiki [2] to get a feel for its power. (@carmelo12341)

[1] https://wiki.archlinux.org/index.php/Minecraft#Setup
[2] https://wiki.archlinux.org/index.php/GNU_Screen#Common_Commands