Two-Minute Drill

Here are some of the key points from the certification objectives in Chapter 7.

Network Configuration


Key network configuration files are in the /etc/sysconfig directory: the network file, and the networking and network-scripts subdirectories.


You can start the Network Configuration utility with the system-config-network command.


To manage network settings on each interface, use dhclient, ifup, and ifdown.


The ifconfig command is used to configure and display network devices.


Use ifup eth0 and ifdown eth0 to activate and deactivate the eth0 interface.


The netstat command is used to display a plethora of network connectivity information; route -n is another way to check the current routing table.


The arp command is used to view or modify the local hardware address database.

The CUPS Printing System


The Printer Configuration tool, which you can start with the system-config-printer command, can be used to configure most popular printers in /etc/cups/cupsd.conf.


CUPS provides a Web-based interface. Once enabled, you can get to this interface in your browser by navigating to http://localhost:631.

Automating System Administration: cron and At


The cron system allows any user to schedule jobs so they run at given intervals.


The at system allows users to configure jobs to run once at a scheduled time.


The crontab command is used to work with cron files. Use crontab -e to edit, crontab -l to list, or crontab -d to delete cron files.


The /etc/cron.allow and /etc/cron.deny files are used to control access to the cron job scheduler.

Understanding, Maintaining, and Monitoring System Logs


Red Hat Enterprise Linux includes two logging daemons: klogd for kernel messages and syslogd for all other process activity. Both are activated by the /etc/init.d/syslog service script.


You can use log files generated by the syslogd daemon to track activities on your system.


Most log files are stored in /var/log.


You can configure what is logged through the syslog configuration file, /etc/ syslog.conf.

RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302)
Linux Patch Management: Keeping Linux Systems Up To Date
ISBN: 0132366754
EAN: 2147483647
Year: 2004
Pages: 227
Authors: Michael Jang © 2008-2017.
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