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Print jobs sent to a class are forwarded to the next available printer in the class. Backends are specified using a URI (Universal Resource Identifier) where the URI scheme is the backend name, e.g., "ipp://11.22.33.44/ipp/print" specifies the "ipp" backend - like PPD files, some backends come with CUPS while others come with your operating system.Ĭlasses are associated with one or more printers and are typically used to distribute print jobs amongst a group of printers or provide redundancy or high availability when printing. CUPS currently uses PPD (PostScript Printer Description) files to describe the printer and driver programs needed, some of which come with CUPS while others come with your operating system or Linux distribution. Printers use a description file with one or more driver ("filter") programs that communicate with the printer through a "backend" program. Introductionĭestinations are individual printers and classes (pools) of printers. This help document describes how to configure and manage destinations with CUPS. Command-Line Printer Administration Command-Line Printer Administration