Free Linux Foundation LFCS Exam Questions

Become Linux Foundation Certified with updated LFCS exam questions and correct answers

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Total 260 Questions | Updated On: Mar 07, 2026

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Question 1

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 connectto remote hosts.

Answer: B

Question 2

How can the normal output of a command be written to a file while discarding the error output?

A : command >2>file 1&>/dev/null

B : command < output > /dev/null

C : command > discard-error > file

D : command > /dev/null 2&>1 output

E : command >file 2>/dev/null

Answer: A

Question 3

Which of the following commands will send output from the program myapp to bothstandard output (stdout) and the file file1.log?

A : cat < myapp | cat> file1.log

B : myapp 0>&1 | cat > file1.log

C : myapp | cat > file1.log

D : myapp | teefile1.log

E : tee myapp file1.log

Answer: D

Question 4

Which of the following are valid stream redirection operators within Bash? (Choose THREEcorrect answers.)

A :

B :

C : >

D : >>>

E : %>

Answer: A,B,C

Question 5

Which of the following statements is correct regarding the command foo 1> bar?

A : The stdout from the command foo is appended to the file bar.

B : The stdout from the command foo overwrites the file bar.

C : The commandfoo receives its stdin from the file bar.

D : The command foo receives its stdin from the stdout of the command bar.

E : The stderr from the command foo is saved to the file bar.

Answer: B

Page: 1 / 52

Total 260 Questions | Updated On: Mar 07, 2026

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