5.7. Default Printer and Server Host

Options used:

If the preceding steps do not yield a printer name and the require_explicit_q flag is not set then the default_printer and default_remote_host values from the lpd.conf configuration file will be used. If there is no configuration file, then the compile time defaults will be used.

Using the fallback values is usually not a desirable event and may indicate that you have a misconfigured host, so the compile time defaults are usually set to missingprinter@localhost to provide an annoying message for users.