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CompTIA® Linux+ Certification, Powered by LPI, Student Manual by Axzo Press

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162 CompTIA Linux+ Certification, Powered by LPI
Topic A: Booting Linux
This topic covers the following CompTIA exam objectives for Linux+ [Powered by
LPI] Certification, LX0-101 and LX0-102 exams.
# Objective
101.1 Determine and configure hardware settings
Configure system with or without external peripherals such as keyboards
101.2 Boot the system
Provide common commands to the boot loader and options to the kernel at boot time
Demonstrate knowledge of the boot sequence from BIOS to boot completion
Check boot events in the log file
The following is a partial list of the used files, terms, and utilities:
/var/log/messages
dmesg
BIOS
bootloader
kernel
init
101.3 Change runlevels and shutdown or reboot system
Set the default runlevel
Change between runlevels including single user mode
Alert users before switching runlevels or other major system events
Properly terminate processes
The following is a partial list of the used files, terms, and utilities:
/etc/inittab
shutdown
init
/etc/init.d
telinit
Troubleshooting and maintenance 163
# Objective
102.2 Install a boot manager
Providing alternative boot locations and backup boot options
Install and configure a boot loader such as GRUB
Interact with the boot loader
The following is a partial list of the used files, terms, and utilities:
/boot/grub/menu.lst
grub-install
MBR
superblock
/etc/lilo.conf
lilo
106.2 Set up a display manager
Turn the display manager on or off
The following is a partial list of the used files, terms, and utilities:
/etc/inittab
110.2 Set up host security
The following is a partial list of the used files, terms, and utilities:
/etc/passwd
/etc/inittab
Booting
Explanation
Booting is the process by which your computer starts up. This process goes through a
number of phases:
A POST (power on self test)
B MBR load
C Boot loader
D Daemon loading
POST
The power on self test is a hardware level test performed by the components of your
computer. This test checks the basic operability of the system hardware. The POST
process is controlled by your computer’s BIOS, which is set by the manufacturer.
At the end of the POST test, your computer searches for a bootable disk drive or
network boot location. You can configure the search order for the boot disk by
configuring your computer’s CMOS (BIOS configuration).
MBR load
Once the boot disk has been located, your computer reads the master boot record
(MBR) from that disk. The MBR contains information about how to locate and start the
operating system. The MBR is written when you install your operating system.

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