Linux MCQ Questions with answers and solutions Page 168

Q. Which command is used to switch to another user account?

(A) su - username
(B) login username
(C) switch username
(D) changeuser username

💬 Discuss

✅ Correct Answer: (A) su - username

Explanation: 'su -' switches user shell.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:03 am in Linux

Q. What is the use of the 'passwd' command?

(A) Change user password
(B) Create a new user
(C) Delete a user
(D) Lock a user account

💬 Discuss

✅ Correct Answer: (A) Change user password

Explanation: 'passwd' allows users to change their passwords.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:03 am in Linux

Q. Which command is used to display the kernel version in Linux?

(A) linux --version
(B) uname -r
(C) version
(D) kernel -v

💬 Discuss

✅ Correct Answer: (B) uname -r

Explanation: 'uname -r' prints the kernel release version of the Linux system.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which command will display the disk usage of a directory and its contents?

(A) df
(B) diskcheck
(C) du
(D) usage

💬 Discuss

✅ Correct Answer: (C) du

Explanation: 'du' stands for disk usage and shows the size of directories and files.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which command can be used to create an empty file in Linux?

(A) touch
(B) makefile
(C) create
(D) echo

💬 Discuss

✅ Correct Answer: (A) touch

Explanation: 'touch filename' creates a new empty file or updates the timestamp if it already exists.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which command is used to print the current user ID and group ID?

(A) whoami
(B) id
(C) userinfo
(D) who

💬 Discuss

✅ Correct Answer: (B) id

Explanation: 'id' prints user ID (UID), group ID (GID), and the groups you belong to.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. What does the command 'ls -lh' do?

(A) Lists hidden files only
(B) Lists all files with human-readable sizes
(C) Lists file contents
(D) Locks hidden files

💬 Discuss

✅ Correct Answer: (B) Lists all files with human-readable sizes

Explanation: 'ls -lh' lists files with details and sizes in a human-readable format like KB, MB.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which of these is a valid runlevel for reboot?

(A) 3
(B) 5
(C) 1
(D) 6

💬 Discuss

✅ Correct Answer: (D) 6

Explanation: Runlevel 6 is used to reboot the system in SysV-style init systems.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which command shows the path of a command's executable?

(A) location
(B) path
(C) which
(D) where

💬 Discuss

✅ Correct Answer: (C) which

Explanation: 'which' shows the path of an executable as stored in the $PATH variable.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

Q. Which command lists all files and subdirectories recursively?

(A) ls -R
(B) ls -l
(C) ls -a
(D) ls -d

💬 Discuss

✅ Correct Answer: (A) ls -R

Explanation: 'ls -R' recursively lists all files and directories starting from the current directory.

Published by Mr. Dubey ⭐ 111.42K Points at 28-Jun-2025 12:07 pm in Linux

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