Download CompTIA Linux+ Study Guide: Exam XK0-003 by Roderick W. Smith PDF

By Roderick W. Smith

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For this reason, this chapter emphasizes configuring GRUB—this boot loader can be used to boot Linux, whether it functions as the primary, secondary, or tertiary boot loader. If you opt to use GRUB as a secondary boot loader, you’ll need to consult the documentation for your primary boot loader to learn how to configure it. On a Linux-only system, there’s no need to deal with a third-party boot loader; LILO or GRUB can function as a primary boot loader without trouble on such systems. Third-party boot loaders are most useful when you have two or more OSs installed and particularly when LILO or GRUB has trouble redirecting the boot process to the other OSs, which is rare.

Successful uses of the su command to acquire root privileges C. Failed attempts to log in to a server controlled through xinetd D. Failed attempts by a user to read another user’s files via the cat command 4. What does the -t parameter to telinit control? A. The time between a polite shutdown of unneeded servers (via SIGTERM) and a forceful shutdown (via SIGKILL) B. The time between issuing the telinit command and the time the runlevel change takes place C. The runlevel that’s to be entered on completion of the command D.

See Chapter 12 for more information. 13. B. x Linux kernel’s firewall features. ) Apache is a Web server, and wall sends messages to all currently logged-on users. TCP Wrappers controls access to specific servers, but it isn’t a firewall per se. See Chapter 9 for more information. 14. B. These scripts hold startup commands individualized for their host (“local”) computer, as opposed to those that are provided with the distribution. In principle, these scripts could be used for any of the other listed purposes, but this isn’t their usual function.

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