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Red Hat Linux 7.3: The Official Red Hat Linux Customization Guide
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Configuring the CUPS Printing System

CUPS (Common UNIX Printing System) can be used instead of the default LPRng printing system. Some of the advantages of CUPS include:

  • Support for IPP (next generation network printing protocol)

  • Autodetection of network printers

  • Web interface configuration tool

  • Support for PPD printer description files

  • Support for a wide-range of printers

Switching Print Systems

To use the CUPS printing system instead of LPRng, run the redhat-switch-printer application using one of the following methods:

  • On the GNOME desktop, go to the Main Menu Button (on the Panel) => Programs => System => redhat-switch-printer.

  • On the KDE desktop, go to the Main Menu Button (on the Panel) => System => redhat-switch-printer.

  • Type the command redhat-switch-printer at a shell prompt (for example, in an XTerm or GNOME terminal).

The program automatically detect if the X Window System is running. If it is running, the program starts in graphical mode as shown in Figure 21-17. If X is not detected, it starts in text-mode.

Figure 21-17. redhat-switch-printer

If you selected CUPS, you must make sure the lpd service is stopped and the cups service is started:

/sbin/service lpd stop
/sbin/service cups start

If you selected LPRng, you must make sure the cups service is stopped and the lpd service is started:

/sbin/service cups stop
/sbin/service lpd start

Also use chkconfig, ntsysv, or serviceconf to configure your sytsem to start the cups service automatically and disable the lpd service. Refer to Chapter 8 for details.

CUPS Configuration Interface

After starting the cups daemon, open a Web browser and connect to the URL http://localhost:631 as shown in Figure 21-18.

To add a printer, click Manage Printers, and then click the Add Printer button. For more information, click the Help button.


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