Chapter 10. Managing the System
IN THIS CHAPTER
Checking memory use with free, top, vmstat, and slabtop
Viewing CPU usage with iostat, dstat, and top
Monitoring storage devices with iostat, vmstat, and lsof
Working with dates/time using date, hwclock, cal, and NTP
Changing GRUB boot loader behavior
Rebuilding the initial ramdisk
Dealing with run levels with runlevel and init
Adding, removing, and listing services with chkconfig and service
Shutting down the system with reboot, halt, and shutdown
Checking and changing kernel driver settings with lsmod, modinfo, and modprobe
Watching hardware settings with lspci, dmidecode, and hdparm
Without careful management, the demands on your Linux system can sometimes exceed the resources you have available. Being able to monitor your system's activities (memory, CPU, and device usage) over time can help you make sure that your machine has enough resources to do what you need it to. Likewise, managing other aspects of your system, such as the device drivers it uses and how the boot process works, can help avoid performance problems and system failures.
This chapter is divided into several sections that relate to ways of managing your Fedora or other Linux system. The first section can help you monitor the resources (processing power, devices, and memory) on your Linux system. The next section describes how to check and set your system clock. Descriptions of the boot process and subsequent run levels follow. The last sections describe how to work with the ...