FREE Linux Foundation Certified System Administrator 2026 Questions and Answers

Question 1

What is the proper command to open the download.bz2 archive file and extract its contents?

Accepted Answer

bunzip2 download.bz2

Answer

uncompress download.bz2

Answer

unpack download.bz2

Answer

unzip2 download.bz2

Answer

unzip download.bz2

Question 2

Which of the above commands manages and preloads the keys required for automatic authentication when connecting to other machines over SSH?

Accepted Answer

ssh-agent

Answer

ssh-add

Answer

sshd

Answer

ssh-keygen

Question 3

What is the proper command to open the download.bz2 archive file and extract its contents?

Accepted Answer

bunzip2 download.bz2

Answer

unpack download.bz2

Answer

unzip download.bz2

Answer

uncompress download.bz2

Question 4

How can the error output of a command be discarded while writing the normal output to a file?

Accepted Answer

command >file 2>/dev/null

Answer

command < output > /dev/null

Answer

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

Answer

command > /dev/null 2&>1 output

Answer

command > discard-error > file

Question 5

What command will show the final line of the text file foo.txt?

Accepted Answer

tail -n 1 foo.txt

Answer

tail foo.txt

Answer

head -n 1 foo.txt

Answer

last -n 1 foo.txt

Question 6

Which of the following commands prints a listof usernames (first column) and their primary group (fourth column) from the /etc/passwd file?

Accepted Answer

cut -d : -f 1,4 /etc/passwd

Answer

split -c 1,4 /etc/passwd

Answer

fmt -f 1,4 /etc/passwd

Answer

paste -f 1,4 /etc/passwd

Question 7

Define Ubuntu

Accepted Answer

Debian derived, most popular distribution.

Answer

Gnu's, not unix

Answer

Human readable set of instruction.

Answer

Dominant web server used today.