Book: LPI Linux
Certification in a Nutshell Section: Chapter 8. Exam
101 Review Questions and Exercises
8.3 Boot, Initialization, Shutdown,
and Runlevels (Topic 2.6)
8.3.1 Review questions
-
Name and briefly describe the two parts of
LILO. Which part has a configuration file and what is that
file called?
-
What are the ramifications relating to new
hardware when running a monolithic kernel?
-
Which three runlevels are well defined
across Linux distributions, and what actions to they
perform?
-
Describe a situation that would imply the
need to switch to single-user mode.
-
What are the two alphabetic prefixes used
in the rd directories, and
what do they stand for?
-
How can you shutdown and halt a Linux
system immediately using shutdown?
8.3.2 Exercises
8.3.2.1 Exercise 2.6-1.
Boot
-
Examine the contents of
/etc/lilo.conf. How many kernel images or operating
systems are configured for load by LILO? Explain the options
you find in the file.
-
Install the boot loader by executing lilo. What happened?
-
Boot your system and manually specify the
root filesystem using the root= keyword at the LILO
prompt. What happens if you specify the wrong partition?
-
Use dmesg
and less to examine boot-time
messages. Compare what you find to the latest boot messages
found in /var/log/messages.
-
Boot your system and use the single or 1 option to boot directly into
single-user mode.
8.3.2.2 Exercise 2.6-2.
Runlevels
-
After booting to single-user mode, switch
to your normal runlevel using init
n.
-
Does the system come up as
expected?
-
Enter init
1 to go back to single-user mode. What daemons are
still running?
-
Familiarize yourself with the contents of a
few of the scripts in /etc/rc.d/init.d (your system
directories may vary).
-
Look in rc0.d through rc6.d
for links to the scripts you examined. How are the scripts
used? In which runlevels is the corresponding service
active?
-
Shut down your system with init 0.
-
Shut down your system with shutdown -h now.
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