Apple ColorLaserWriter 12/600PS - Manual (Page 226)

Printing from a UNIX workstation to the printer
You don’t need any special software to use the printer. On most UNIX
systems, you use either the
lpr or lp command to print documents over a
TCP/IP network to the printer. (The documents must be in PostScript
format.)
Example for lpr
lpr -PKeithsLW file.ps
Example for lp
lp -d KeithsLW file.ps
The way you print and choose printing options can differ from one
application program to another. To find out more about printing from your
application programs, read the documentation that came with the programs.
202 Chapter 8