Linux MCQs with answers Page - 164

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Q. Which command shows the manual for systemd service management?

  • (A) man systemctl
  • (B) man sysctl
  • (C) man systemd
  • (D) man services
💬 Discuss
✅ Correct Answer: (A) man systemctl
Explanation: 'systemctl' manages systemd services.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:02 am in Linux

Q. Which command is used to change a file's permissions numerically?

  • (A) chmod
  • (B) chown
  • (C) chgrp
  • (D) umask
💬 Discuss
✅ Correct Answer: (A) chmod
Explanation: 'chmod' changes permissions using numeric or symbolic modes.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:02 am in Linux

Q. Which command will display the last 10 lines of a log file in real time?

  • (A) tail -f /var/log/syslog
  • (B) head /var/log/syslog
  • (C) less /var/log/syslog
  • (D) cat /var/log/syslog
💬 Discuss
✅ Correct Answer: (A) tail -f /var/log/syslog
Explanation: 'tail -f' shows last lines and updates as new lines are added.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:02 am in Linux

Q. What is the role of the 'cron' daemon in Linux?

  • (A) Schedules and runs periodic tasks
  • (B) Manages network connections
  • (C) Handles user logins
  • (D) Monitors system logs
💬 Discuss
✅ Correct Answer: (A) Schedules and runs periodic tasks
Explanation: 'cron' runs scheduled jobs at specified times.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:02 am in Linux

Q. Which command is used to find files by name?

  • (A) find /path -name filename
  • (B) grep filename
  • (C) locate filename
  • (D) search filename
💬 Discuss
✅ Correct Answer: (A) find /path -name filename
Explanation: 'find' searches directory trees for files matching criteria.

Published by Mr. Dubey ⭐ 111.42K Points at 08-Jun-2025 08:02 am in Linux

Q. Which command is used to display the current user's username?

  • (A) whoami
  • (B) id
  • (C) username
  • (D) users
💬 Discuss
✅ Correct Answer: (A) whoami
Explanation: 'whoami' prints the current logged-in username.

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

Q. What does the 'env' command do?

  • (A) Displays environment variables
  • (B) Sets environment variables
  • (C) Deletes environment variables
  • (D) Runs a command with a clean environment
💬 Discuss
✅ Correct Answer: (A) Displays environment variables
Explanation: 'env' shows the current environment variables.

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

Q. Which command will recursively list all files and directories?

  • (A) ls -R
  • (B) ls -a
  • (C) ls -l
  • (D) ls -r
💬 Discuss
✅ Correct Answer: (A) ls -R
Explanation: 'ls -R' lists directories recursively.

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

Q. Which directory contains user home directories by default?

  • (A) /home
  • (B) /usr
  • (C) /root
  • (D) /etc
💬 Discuss
✅ Correct Answer: (A) /home
Explanation: User home directories are under /home.

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

Q. Which command is used to rename a file?

  • (A) mv oldname newname
  • (B) rename oldname newname
  • (C) cp oldname newname
  • (D) rn oldname newname
💬 Discuss
✅ Correct Answer: (A) mv oldname newname
Explanation: 'mv' moves or renames files.

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

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