Configuring your RealPort printers with CUPS in Red Hat. Here are the steps taken for configuring a printer:
Point the web browser to http://localhost:631
Select [Add Printer]
Fill in the name, location and description. 
Select the "Serial Port #1" device.
Fill in the appropriate settings for baud rate parity, etc.. 
Select the correct printer make. 
Select the correct printer model, click [Add Printer]
Since the Digi serial port does not display in the CUPS device list, this will need to be changed to the correct tty device:
Edit the /etc/cups/printers.conf file and change ttyS0 to the appropriate tty device.
Restart the cups daemon:
/etc/init.d/cups restart 
Last updated: 
Jan 01, 2024