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XK0-006 Practice Question: Run a script '/usr/local/bin/cleanup.sh' every…

An administrator needs to run a script '/usr/local/bin/cleanup.sh' every day at 2:30 AM. Which crontab entry is correct?

⚠ Common exam trap

CompTIA often tests the order of minute and hour fields in crontab entries, and the trap here is that candidates may swap them (placing hour first) or use `*/30` thinking it means 'at 30 minutes past the hour' rather than 'every 30 minutes'.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

30 2 * * * /usr/local/bin/cleanup.sh

The correct crontab syntax is `minute hour day month weekday command`. Option D specifies minute 30, hour 2, and asterisks for all other fields, which means the script runs at 2:30 AM every day. This matches the requirement exactly.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    2 30 * * * /usr/local/bin/cleanup.sh

    Why it's wrong here

    Hour and minute are reversed.

  • ✗

    */30 2 * * * /usr/local/bin/cleanup.sh

    Why it's wrong here

    Runs every 30 minutes between 2:00-2:59 AM.

  • ✗

    30 * * * * /usr/local/bin/cleanup.sh

    Why it's wrong here

    Runs at minute 30 of every hour.

  • ✓

    30 2 * * * /usr/local/bin/cleanup.sh

    Why this is correct

    Correct syntax for 2:30 AM daily.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.