Managing print queues can be an easy or a complicated task. But when troubleshooting queues, a great tool to have is an understanding of how Mac OS X, and more specifically, how CUPS is interacting with those jobs. Some basic print job/queue management commands: lpr—Send a print job to a print queue. lpq—Show the status of jobs sent to a print queue. lprm—Delete jobs from a print queue. lpc—Control print queues.