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Line Printer Daemon protocol
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<p>The Line Printer Daemon protocol/Line Printer Remote protocol (or LPD, LPR) is a network <a href="/facts/Printing_protocol/sf3eTqR4">printing protocol</a> for submitting print jobs to a remote printer. The original implementation of LPD was in the <a href="/facts/Berkeley_printing_system/PzJfcnoU">Berkeley printing system</a> in the <a href="/facts/BSD/XQKcURrh">BSD</a> <a href="/facts/UNIX/0pNL2seI">UNIX</a> operating system; the <a href="/facts/LPRng/dNsEcuuv">LPRng</a> project also supports that protocol. The <a href="/facts/Common_Unix_Printing_System/GH6I7g3U">Common Unix Printing System</a> (or CUPS), which is more common on modern <a href="/facts/Linux/9FvCKSTq">Linux</a> distributions and also found on <a href="/facts/MacOS/Y93vVpTm">macOS</a>, supports LPD as well as the <a href="/facts/Internet_Printing_Protocol/mw97uT8B">Internet Printing Protocol (IPP)</a>. Commercial solutions are available that also use Berkeley printing protocol components, where more robust functionality and performance is necessary than is available from LPR/LPD (or CUPS) alone (such as might be required in large corporate environments). The LPD Protocol Specification is documented in RFC 1179. </p>