TAILIEUCHUNG - Suse Linux 9.3 For Dummies- P20
Suse Linux For Dummies- P20:This part is all about getting you started on your way to a lasting relationship with SUSE Linux. Before you can begin your SUSE Linux experience, I spend a chapter explaining what SUSE Linux is and what you can do with SUSE Linux (pretty much anything you can do with a PC that runs Windows). | Chapter 17 Look Ma. I m a Sysadmin 265 same name as the service and these script files are located in the etc directory. For example the script etc xinetd starts and stops the xinetd service. To restart this service manually you would type etc xinetd restart in a terminal window. You can enhance your system administration skills by familiarizing yourself with the scripts in the etc directory. To see its listing type the following command 1 s etc The script names give you some clue about which server the script can start and stop. For example the bluetooth script starts and stops the processes required for Bluetooth networking services. Checking Your System s Performance When you re the system administrator you must keep an eye on how well your SUSE Linux system is performing. You can monitor the overall performance of your system by looking at information such as Central Processing Unit CPU usage Physical memory usage Virtual memory swap-space usage Hard drive usage SUSE Linux comes with a number of utilities that you can use to monitor one or more of these performance parameters. Here I introduce a few of these utilities and show you how to understand the information presented by these utilities. Using the top utility To view the top CPU processes the ones that are using most of the CPU time you can use the text mode top utility. To start that utility type top in a terminal window or text console . The top utility then displays a text screen listing the current processes arranged in the order of CPU usage along with various other information such as memory and swap-space usage. Figure 17-4 shows a typical output from the top utility. Please purchase PDF Split-Merge on to remove this watermark. 266 Part IV Becoming a SUSE Wizard Figure 17-4 You can see the top CPU processes by using the top utility. The top utility updates the display every five seconds. If you keep top .
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