In this chapter, we’ll look at some aspects of using printers with FreeBSD. As a user, you
don’t access printers directly. Instead, a series of processes, collectively called the
spooler, manage print data. One process, lpr, writes user print data to disk, and another,
lpd, copies the print data to the printers. This method enables processes to write print
data even if the printers are busy and ensures optimum printer availability.