Linux Foundation LFCS Actual Free Exam Questions & Community Discussion

Exam Code/Number: LFCS
Exam Name/Title: Linux Foundation Certified System Administrator
Certification Provider: Linux Foundation
Corresponding Certification: Linux Foundation Certified

Exam Questions: 260
Updated On: Jun 03, 2026

Question #29

CORRECT TEXT
Which directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

Discussion 0

Correct Answer:

/etc/xinetd.d/, /etc/xinetd.d

Question #30

What is the difference between the commands test -e path and test -f path?

A. The -f option tests for a regular file. The -e option tests for an empty file.

B. Both options check the existence of the path. The -f option also confirms that it is a regular file.

C. The -f option tests for a regular file. The -e option tests for an executable file.

D. They are equivalent options with the same behaviour.

Discussion 0

Correct Answer: B Vote an answer

Question #31

Which of the following commands creates an ext3 filesystem on /dev/sdb1? (Choose TWO correct answers.)

A. /sbin/mkfs -t ext3 /dev/sdb1

B. /sbin/mke3fs -j/dev/sdb1

C. /sbin/mke2fs -j /dev/sdb1

D. /sbin/mkfs -c ext3 /dev/sdb1

Discussion 0

Correct Answer: A,C Vote an answer

Question #32

What output will the command seq 10 produce?

A. A continuous stream of numbers increasing in increments of 10 until stopped.

B. The number 10 to standard output.

C. The numbers 0 through 9 with one number per line.

D. The numbers 1 through 10 with one number per line.

Discussion 0

Correct Answer: D Vote an answer

Question #33

What of the following can be done by the command ifconfig? (Choose TWO correct answers.)

A. Change the netmask used on a network interface.

B. Specify which network services are available on a network interface.

C. Allow regular users to change the network configuration of a network interface.

D. Specify the kernel module to be used with a network interface.

E. Set a network interface active or inactive.

Discussion 0

Correct Answer: A,E Vote an answer

Question #34

What is the output of the following command?
for token in a b c; do
echo -n ${token};
done

A. {a}{b}{c}

B. $token$token$token

C. anbncn

D. abc

E. a b c

Discussion 0

Correct Answer: D Vote an answer

Question #35

Creating a hard link to an ordinary file returns an error. What could be the reason for this?

A. The source file is read-only.

B. The source and the target are on different filesystems.

C. The source file is a shell script.

D. The source file is already a hard link.

E. The source file is hidden.

Discussion 0

Correct Answer: B Vote an answer

Question #36

CORRECT TEXT
With IPv6, how many bits have been used for the interface identifier of an unicast address? (Specify the number using digits only.)

Discussion 0

Correct Answer:

Question #37

CORRECT TEXT
After configuring printing on a Linux server, the administrator sends a test file to one of the printers and it fails to print. What command can be used to display the status of the printer's queue? (Specify ONLY the command without any path or parameters.)

Discussion 0

Correct Answer:

lpq, /usr/bin/lpq, lpstat, /usr/bin/lpstat

Question #38

What is true about the file /etc/localtime?

A. It is either a symlink to or a copy of a timezone information file such as /usr/share/zoneinfo/Europe/Berlin.

B. It is created and maintained by the NTP service based on the geolocation of the system's IP address.

C. It is a plain text file containing a string such as Europe/Berlin.

D. It is a symlink to /sys/device/clock/ltime and always contains the current local time.

Discussion 0

Correct Answer: A Vote an answer

Question #39

Which of the following statements is valid in the file /etc/nsswitch.conf?

A. include /etc/nsswitch.d/

B. multi on

C. 192.168.168.4 dns-server

D. hosts: files dns

Discussion 0

Correct Answer: D Vote an answer

Question #40

On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?

A. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.

B. The local routing information may be corrupted and must be re-validated using a routing protocol.

C. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.

D. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.

Discussion 0

Correct Answer: C Vote an answer

Question #41

Which of the following commands replaces each occurrence of 'bob' in the file letter with 'Bob' and writes the result to the file newletter?

A. sed 's/bob/Bob/g' letter > newletter

B. sed 's/bob, Bob/' letter > newletter

C. sed s/bob/Bob/ letter < newletter

D. sed '/bob/Bob' letter >newletter

E. sed 's/bob/Bob' letter > newletter

Discussion 0

Correct Answer: A Vote an answer

Question #42

Which file used by XDM specifies the default wallpaper?

A. /etc/X11/xdm.conf

B. /etc/X11/xdm/Defaults

C. /etc/X11/defaults.conf

D. /etc/X11/xdm/Xsetup

Discussion 0

Correct Answer: D Vote an answer

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