If you are trying to find out about linux maybe visit a site such as
linux.org
About the text scripting, probs when you setup your game server you will load the game, click on a menu that says "create new multi-player game" or the likes and then choose options. The text based scripting maybe means you write a config file with all the game options in it so each time you start a game you do not have to choose all the options again, and in some cases using a text based config file gives more control over the game setup