A. au
B. ps
C. du
D. pid
✅ The correct answer is option B.
Basic of linux unix MCQs
Which of the following command is used to count just the number of lines contained in a file ?
A. wc -lD.
B. wc -c
C. wc -w
D. wc -r
✅ The correct answer is option nu.
Which of the following commands is used to count the total number of lines, words, and characters contained in a file ?
A. count p
B. wc
C. wcount
D. countw
✅ The correct answer is option B.
Which of the following command addresses all users who are currently hooked on ?
A. write
B. mail
C. wall
D. mesg
✅ The correct answer is option C.
Which symbol is used to separate more than one command in the same command line ?
A. $
B. #
C. :
D. ;
✅ The correct answer is option D.
Which command is used to print a file ?
A. print
B. prn
C. pg
D. lp
✅ The correct answer is option D.
What command is used to display a file contents in octal form ?
A. oct
B. of
C. od
D. cd
✅ The correct answer is option C.
Which of the following commands is used to remove files ?
A. erase
B. delete
C. rm
D. dm
✅ The correct answer is option C.
Which shell’s wild-cards is used to match a single character ?
A. *
B. ?
C. [ijk]
D. [!ijk]
✅ The correct answer is option B.
Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3 ?
A. chmod u+x emp[1-3]
B. chmod 777 emp*
C. chmod u+r ??? emp
D. chmod 222 emp?
✅ The correct answer is option A.