To install a printer:
Next, enter the following command substituting the correct
port number for nn (for example, 1a for
This disables logins on the port you have connected to your printer and allows the port to be used for serial communication.
If you are connecting a parallel printer, you must first run the Hardware/Kernel Manager or use the mkdev parallel command to create a parallel port. The printer must use a standard Centronics interface cable. The main parallel port is typically a built-in port or on a parallel/serial adapter (as opposed to being on a monochrome video card). The parallel port should have been configured to use interrupt vector 7 and be recognized as /dev/lp0 after running mkdev parallel. See parallel(HW) and ``Adding and configuring parallel ports'' for more information.
For serial printers, enter the following command:
date > /dev/ttynn
where nn identifies the serial port you are using (for example, 1a for /dev/tty1a).
You may need to specify the printer's
settings (speed, parity, data length and so on)
if these differ from the serial line's default settings,
For example, to test a 4800 baud printer on /dev/tty1a
which is set to 9600 baud:
(stty 4800 ; date > /dev/tty1a) < /dev/tty1a
For parallel printers, enter the following command:
date > /dev/lpn
where n is the number of the parallel port you are using (for example /dev/lp0).
or for a parallel printer:
(date ; echo "\014") > /dev/lpn
Laser printers that are in PostScript mode can be tested by sending
them a PostScript file. For example, to send the file foo.ps
to the serial port nn enter the following command:
cat foo.ps > /dev/ttynn
To send the file to the parallel port n enter the following command:
cat foo.ps > /dev/lpn