Practice LFCS Exam Online

Question 1

Which of the following commands reboots the system when using SysV init? (Choose TWO

correct answers.)

A : shutdown -r now

B : shutdown -r "rebooting"

C : telinit 6

D : telinit 0

E : shutdown -k now "rebooting"

Answer: A,C

Question 2

How is a display manager started?

A :

It is started by a user using the command startx.

B : It is started like any other system service by the init system.

C : It is started by inetd when a remote hosts connects to the X11 port.

D : It is started automatically when a X11 user logs in to the system console.

Answer: B

Question 3

When running the command

sed -e "s/a/b/" /tmp/file >/tmp/file

While /tmp/file contains data, why is /tmp/file empty afterwards?

A : The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.

B : The command sed did not match anything in that file therefore the output is empty.

C : When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.

D : Redirection for shell commands do not work using the > character. It only works using the | character instead.

Answer: C

Question 4

Which of the following are requirements in order to run a shell script like a regular

command from anywhere in the filesystem? (Choose THREE correct answers.)

A : The user issuing the command must be in the group script.

B : The script file must be found in the $PATH.

C : The script file must have the executable permission bit set.

D : The script must begin with a shebang-line (#!) that points to the correct interpreter.

E : The file system on which the script resides must be mounted with the option scripts.

Answer: B,C,D

Question 5

What is a purpose of an SSH host key?

A : It must be sent by any SSH client in addition to a user key in order to identify the client's host.

B : It provides the server's identity information to connecting SSH clients.

C : It is the root key by which all user SSH keys must be signed.

D : It authenticates any user that logs into a remote machine from the key's host.

E :

It is used by system services like cron, syslog or a backup job to automatically connect

to remote hosts.

Answer: B

Name:	LINUX FOUNDATION CERTIFIED SYSTEM ADMINISTRATOR (LFCS)
Exam Code:	LFCS
Certification:	Linux Foundation Certified SYSADMIN
Vendor:	Linux Foundation
Total Questions:	260
Last Updated:	Apr 25, 2024

Linux Foundation LFCS