Linux MCQ Questions with answers and solutions Page 160

Q. Which command is used to schedule a job to run once at a specific time?

(A) at
(B) cron
(C) batch
(D) systemd

💬 Discuss

✅ Correct Answer: (A) at

Explanation: 'at' schedules one-time tasks.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. What is the function of the 'sudo' command?

(A) Runs a command with elevated privileges
(B) Switches user
(C) Stops a process
(D) Updates the system

💬 Discuss

✅ Correct Answer: (A) Runs a command with elevated privileges

Explanation: 'sudo' allows running commands as root or another user.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which command lists users currently logged in?

(A) who
(B) w
(C) users
(D) All of the above

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✅ Correct Answer: (D) All of the above

Explanation: All commands list logged-in users with varying details.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. What does the 'history' command do?

(A) Displays previously executed commands
(B) Shows system logs
(C) Shows file versions
(D) Deletes command history

💬 Discuss

✅ Correct Answer: (A) Displays previously executed commands

Explanation: 'history' lists command line history.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which command will compress files using gzip?

(A) gzip filename
(B) zip filename
(C) compress filename
(D) tar filename

💬 Discuss

✅ Correct Answer: (A) gzip filename

Explanation: 'gzip' compresses files using GNU zip algorithm.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. How do you display the last 20 lines of a file?

(A) tail -20 filename
(B) head -20 filename
(C) cat filename | last 20
(D) more filename

💬 Discuss

✅ Correct Answer: (A) tail -20 filename

Explanation: 'tail -20' shows last 20 lines.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which command is used to change the priority of a running process?

(A) renice
(B) nice
(C) kill
(D) ps

💬 Discuss

✅ Correct Answer: (A) renice

Explanation: 'renice' changes priority of an existing process.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which directory contains user home directories?

(A) /home
(B) /usr
(C) /root
(D) /var

💬 Discuss

✅ Correct Answer: (A) /home

Explanation: /home holds directories for normal users.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which command shows all available disks and partitions in a tree format?

(A) lsblk
(B) blkid
(C) fdisk -l
(D) df -h

💬 Discuss

✅ Correct Answer: (A) lsblk

Explanation: 'lsblk' lists block devices in a tree hierarchy.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Q. Which command is used to change the group ownership of a file?

(A) chgrp
(B) chmod
(C) chown
(D) grpchg

💬 Discuss

✅ Correct Answer: (A) chgrp

Explanation: 'chgrp' changes the group ownership of a file.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:01 am in Linux

Linux MCQs with answers Page - 160

Q. Which command is used to schedule a job to run once at a specific time?

Q. What is the function of the 'sudo' command?

Q. Which command lists users currently logged in?

Q. What does the 'history' command do?

Q. Which command will compress files using gzip?

Q. How do you display the last 20 lines of a file?

Q. Which command is used to change the priority of a running process?

Q. Which directory contains user home directories?

Q. Which command shows all available disks and partitions in a tree format?

Q. Which command is used to change the group ownership of a file?

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