Lesson 7 Quiz

Question 1

The SysVinit is driven by initialization scripts located here.

a) /etc/boot/rc.d
b) /etc/rc.d
c) /boot/rc.d
d) /var/rc.d

Answer 1

b) /etc/rc.d

Question 2

Runlevels define a grouping for daemons/services. Match the runlevel number to the definition used on CentOS / RHEL. 
a) 5  b) 3  c)  1  d) 0
Multiuser with Graphics              
Multiuser but no graphics         
Single User Mode
Poweroff

Answer 2

Multiuser with Graphics a)5
Multiuser but no graphics b)3
Single User Mode c)1
Poweroff d)0

Question 3

What is the UID (user ID) of the root user?

a) 999
b) 0
c) 10
d) 100

Answer 3

b) 0

Question 4

You want to check the status of sshd, to see if it is currently running. What command do you use?

a) service sshd status
b) runlevel sshd
c) chkconfig sshd
d) status sshd

Answer 4

a) service sshd status

Question 5

You type the runlevel command and see the following output

$ runlevel
N 5

What does the output mean?	
a)  N = New Run Level
5 = The New Run Level
b)  N = New Updates
5 = Update Every 5 seconds		
c)  N = No status available
5 = Repeat command in 5 seconds
d)  N = No previous runlevel
5 = The current run level

Answer 5

d) N = No previous runlevel

5 = The current run level

Question 6

Select ALL the ways you can run a command as a root user.

a) Login as root and then run the command as root.
b) Run the command using the su command.
c) Run the command with setuid (set user ID) set to the root user.
d) Run the command using the sudo command. (Assuming the sudoers file has been configured.)

Answer 6

a) Login as root and then run the command as root.
b) Run the command using the su command.
c) Run the command with setuid (set user ID) set to the root user.
d) Run the command using the sudo command. (Assuming the sudoers file has been configured.)

Question 7

This is the key directory for log files.

a) /ect/messages
b) /etc/log
c) /var/log
d) /var/messages

Answer 7

c) /var/log

Question 8

You are using a Linux system and you see some documentation that talks about PAM. What is PAM?

a) Pluggable Authentication Module
b) Powerful Admin Mode
c) Powerful Access Mode
d) Pluggable Access Menu

Answer 8

a) Pluggable Authentication Module

Question 9

Use this command to display messages from the kernel ring buffer.

a) dmesg
b) /var/log/messages
c) runlevel
d) ring-buffer

Answer 9

a) dmesg

Question 10

On CentOS, RHEL, and Fedora, the graphical configuration tools begin with this.

a) system-config-
b) service-
c) gedit-config-
d) chkconfig-

Answer 10

a) system-config-

Question 11

Your BASH terminal is “messed up” and displaying strange characters. Enter the EXACT command you can type ot get your BASH screen back to it’s normal state.

Answer 11

reset

Question 12

Releated to Linux security, select ALL that are TRUE.

a) MAC = Mandatory Access Control
b) Adding SELinux provides MAC.
c) Adding SELinux provides DAC.
d) SELinux is a popular Linux Distro with features simliar to CentOS / RHEL.

Answer 12

a) MAC = Mandatory Access Control

b) Adding SELinux provides MAC.

Question 13

Suppose you are troubleshooting an issue and you could only look at a single log file. What is the most important log file you could look at?

a) /boot/messsages
b) /etc/log/messages
c) /var/log/messages
d) /var/boot/messages

Answer 13

c) /var/log/messages

Question 14

Use this command to see if SELinux enabled on your system.

a) sestatus
b) service selinux status
c) chkconfig selinux
d) runlevel selinux

Answer 14

a) sestatus

Question 15

You want to configure sshd so that it never turns on, regardless of the runlevel. What command do you use?

a) runlevel sshd off
b) chkconfig sshd off
c) service sshd off
d) shutdown sshd

Answer 15

b) chkconfig sshd off

Question 16

This is called the “substitute user” command.

a) subdo
b) setuid
c) su
d) subuser

Answer 16

c) su

Question 17

When using systemd, you can use this command to display info about systemd status.

a) systemd
b) systemd-status
c) systemctl
d) runlevel

Answer 17

c) systemctl

Question 18

The following statements are TRUE related to the Linux init daemon.

a) You can stop and restart the init daemon at any time.
b) The init daemon has PID (process ID) of 0
c) The init daemon is the system and service manager for GNU/Linux.
d) The init daemon has PID (process ID) of 1

Answer 18

c) The init daemon is the system and service manager for GNU/Linux.
d) The init daemon has PID (process ID) of 1

Question 19

Today there are many options for init beyond the original SysVinit. Select ALL the items below that are replacements for SysVinit.

a) PAM
b) Upstart
c) systemd
d) visudo

Answer 19

b) Upstart

c) systemd

Question 20

You want to send a signal to a process. Enter the EXACT command you would enter. (Enter only the command, no command parameters.)

Answer 20

kill

Question 21

Use this command to change runlevels.

a) change-runlevel
b) telinit
c) runlevel
d) service

Answer 21

b) telinit

Question 22

Select ALL statements below that are TRUE related to Linux security.

a) DAC = Discretionary Access Control
b) By default, Linux security is DAC.
c) Adding SELinux provides DAC.
d) PAM = Power Admin Mode

Answer 22

a) DAC = Discretionary Access Control

b) By default, Linux security is DAC.

Question 23

You are using BASH and you need to clear your screen. Enter the EXACT command you would type to clear the screen.

Answer 23

clear

Question 24

This is the BEST command to use to edit the /etc/sudoers file.

a) visudo
b) vim
c) gedit
d) vi

Answer 24

a) visudo

Question 25

You need to boot into single user mode, so you stop the boot loader, and then enter the following at the end of the boot command line. Select ALL the options below that you can enter at the end of the boot command line to boot into single-user mode.

a) 1
b) 3
c) single
d) 0

Answer 25

a) 1

c) single