Spooling Files to Your Printer
Linux uses a modified printing system inherited from the Berkeley Software Distribution (BSD) UNIX operating system. This system is called line-printer spooling. Linux starts printing services by running lpd, the line printer daemon, after you boot. This daemon runs in the background, and waits for program or command-line print requests.
Documents are printed with the lpr command. To print a text document, use the lpr command along with the -P (printer) option to select a desired printer, like this:
$ lpr -Pmylp mydocument
The printer name used with the -P option will be the name of a printer you've defined in your printcap file.
# lpr -Pmylp /usr/share/ghostscript/3.33/examples/tiger.ps
Linux printing automatically ...
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