linux - How to create a cronjob that runs every 5 minutes from 8:30 AM to 9:30 PM? -

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i trying run cron job every 5 minutes 8:30 9:30 pm. i've been searching around web , here came with:

    30,35,40,45,50,55  8 * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1     */5  9-21 * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1     5,10,15,20,25,30 22 * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1

i have looked @ cron job generators not seem address requirement start/end on half-hour. have better or more concise solution? 

30-59/5  8    * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1 */5      9-20 * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1 0-30/5   21   * * * /path/to/whatever.sh >> /var/log/whatever.log 2>&1

should work, , easier read.


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