The Line Printer Daemon protocol/Line Printer Remote protocol is a network printing protocol for submitting print jobs to a remote printer. The original implementation of LPD was in the Berkeley printing system in the BSD UNIX operating system; the LPRng project also supports that protocol. CUPS, which is more common on modern Linux distributions and also found on macOS, supports LPD as well as the Internet Printing Protocol (IPP). Commercial solutions are available that also use Berkeley pri...