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What will be the output behavior of this crontab entry? 30 6 * * 1-5 /usr/bin/script.sh

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Linux CLI - Cron and Scheduling
What will be the output behavior of this crontab entry? 30 6 * * 1-5 /usr/bin/script.sh
ARuns at 6:30 PM every weekend (Saturday and Sunday)
BRuns at 6:30 AM every weekday (Monday to Friday)
CRuns every 30 minutes from 6 AM to 6 PM on weekdays
DRuns at 6:00 AM every day except weekends
Step-by-Step Solution
Solution:

  1. Step 1: Analyze time fields

    Minute=30, Hour=6 means 6:30 AM.

  2. Step 2: Analyze day of week field

    1-5 means Monday to Friday (weekdays).

  3. Final Answer:

    Runs at 6:30 AM every weekday (Monday to Friday) -> Option B

  4. Quick Check:

    1-5 = weekdays, 6:30 AM = 30 6 [OK]
Quick Trick: Day of week 1-5 means Monday to Friday [OK]
Common Mistakes:
  • Confusing AM and PM hours
  • Misreading day ranges
  • Assuming runs every 30 minutes

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