OpenPrinting CUPS is an open source, standards-based printing system for Linux and other Unix-like operating systems. It provides print spooling and network printing using IPP, along with tools to manage printers and print jobs.

Key Features

IPP-based printing with support for IPP Everywhere and AirPrint-compatible printers
Web-based administration interface for managing printers, classes, and jobs
Command-line compatibility with System V (lp) and Berkeley (lpr) printing workflows
Extensible architecture with backends, filters, and driver support (including legacy PPD-based drivers)
C API for integrating printing capabilities into applications and services

Use Cases

Central print server for a home, lab, or organization using IPP
Managing mixed environments of modern IPP printers and legacy driver-based printers
Providing consistent printing commands and queue management across Unix-like systems

Limitations and Considerations

Some printer support may require additional filters/drivers (commonly provided separately)
Legacy PPD/driver workflows may vary in quality depending on the specific printer and driver

CUPS is widely used as the core printing subsystem on many Unix-like platforms, offering interoperable network printing and flexible administration. It is a solid choice when you need standards-based IPP printing with both web UI and CLI management tools.