Under UNIX, the environment variable JUKE_INIT may contain a series of juke commands, which will be executed upon startup of juke. This is most commonly used to set the default jukebox, default slot, etc, but could be used to get a listing of particular locations, etc. automatically upon starting up any juke command.
The variable JUKE_DIR must point to the directory holding the jukebox configuration files, etc. juke will not work properly if that is not the case.