Red Hat Enterprise Linux 5 includes the network configuration tools that have made Linux the operating system backbone of the Internet. To configure your network and troubleshoot any network problems you might encounter during the exam, you need the tools described in this chapter.
Printing is a fundamental service for all operating systems. The default print server for RHEL is CUPS, which has replaced the Line Print Daemon. CUPS supports autoconfiguration of shared network printers and includes a Web-based configuration tool. Red Hat also has a customized graphical configuration tool.
Both support connections to printers using other network protocol suites. A lot of system administration is repetitive. Some of it happens when you want to have a "life," more when you'd rather be asleep. In this chapter, you'll learn how to schedule both one-time and periodic execution of jobs. When troubleshooting, system logging often provides the clues that you need to solve a lot of problems.
You may notice that I diverge slightly from the RH300 course outline in Chapters 5 and 7. To me, it made more sense to include Kickstart with the other package management tools described in Chapter 5.
This chapter directly addresses four items in the Red Hat Exam Prep guide. While the focus is on RHCT requirements, all RHCE candidates need to remember that their exam includes these requirements. The first Red Hat Exam Prep item is associated with the following RHCT Troubleshooting and System Maintenance skill:
Diagnose and correct misconfigured networking.
This chapter also addresses the following RHCT Installation and Configuration skills:
Configure the scheduling of tasks using cron and at.
Use scripting to automate system maintenance tasks.
The final part of this chapter is important for the Troubleshooting and System Maintenance portion of each exam, as log files can help you find the cause of many problems, especially those related to the boot process as well as many services.
If you need to configure SELinux, as defined for the RHCE exam, just about all you can do for the services in this chapter is disable SELinux protection for part or all of each service. However, the SELinux requirements as defined in the Red Hat Exam Prep guide are focused on networking services, which are not covered in this chapter.