Linux+ CompTIA Linux+ Linux GNU and Unix Commands 3

Question 1

Which command displays currently logged-in users along with what they are doing?

Accepted Answer

w

Answer

The w command shows who is logged in and their current activity including load averages.

Question 2

A technician needs to compare two files line by line. Which command should be used?

Accepted Answer

diff file1 file2

Answer

diff compares two files line by line and shows the differences with context markers.

Question 3

What does 'chown alice:developers report.txt' do?

Accepted Answer

Sets owner to alice and group to developers

Answer

chown user:group sets the file's owner to alice and its group to developers.

Question 4

Which command creates a symbolic link named 'link.txt' pointing to 'original.txt'?

Accepted Answer

ln -s original.txt link.txt

Answer

ln -s creates a symbolic (soft) link; without -s it creates a hard link.

Question 5

Which pipeline counts the number of lines in a file named 'data.txt'?

Accepted Answer

cat data.txt | wc -l

Answer

wc -l counts lines; piping cat output through wc -l gives the total line count.

Linux Practice Test