Xtrek is split up into two separate programs, xtrek and xtrekd. Xtrekd is the main server process for the game and accepts as a command line argument the name of a configuration file for the game. For instance
xtrekd cmu.config
will start a game with the contents of the cmu.config file. The daemon first tries to open the config file as an absolute pathname, and then attempts to load the config file from the xtrek library directory. If no config file is specified, a default is read from the library.