lp0 on fire (also known as Printer on Fire) is a semi-obsolete error message generated on some Unix and Unix-like computer operating systems in response to certain types of printer errors. lp0 is the Unix device handle for the first line printer, but the error can be displayed for any printer attached to a Unix/Linux system. The message did not reliably indicate whether the printer in question was actually aflame. The "on fire" message probably originated in the late 1950s, when high speed comp...
