Raspberry Pi - Automation and Scheduling
You want to run a Python script every weekday at 7:15 AM on your Raspberry Pi. Which cron job entry is correct?
You want to run a Python script every weekday at 7:15 AM on your Raspberry Pi. Which cron job entry is correct?
hard🚀 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand cron fields for time and days
The format is minute hour day_of_month month day_of_week. To run at 7:15 AM, minute=15, hour=7. Weekdays are days 1-5 (Monday to Friday).Step 2: Check each option
15 7 * * 1-5 /usr/bin/python3 /home/pi/script.py correctly uses '15 7 * * 1-5' for 7:15 AM on weekdays. 7 15 * * 1-5 /usr/bin/python3 /home/pi/script.py swaps hour and minute. 15 7 * * 6,7 /usr/bin/python3 /home/pi/script.py uses weekend days (6,7). 15 7 1-5 * * /usr/bin/python3 /home/pi/script.py uses day_of_month 1-5, not weekdays.Final Answer:
15 7 * * 1-5 /usr/bin/python3 /home/pi/script.py -> Option BQuick Check:
Weekday cron = 1-5, time 7:15 = 15 7 [OK]
Quick Trick: Weekdays are 1-5 in cron day_of_week field [OK]
Common Mistakes:
MISTAKES- Swapping hour and minute fields
- Using day_of_month instead of day_of_week for weekdays
- Confusing weekend days with weekdays
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