cronjob syntax

cron_syntax

6 elements crontab format

* * * * * *
| | | | | |
| | | | | +– Year (range: 1900-3000)
| | | | +—- Day of the Week (range: 1-7, 1 standing for Monday)
| | | +—— Month of the Year (range: 1-12)
| | +——– Day of the Month (range: 1-31)
| +———- Hour (range: 0-23)
+———— Minute (range: 0-59)

ref  : https://en.wikipedia.org/wiki/Cron

, http://www.nncron.ru/help/EN/working/cron-format.htm

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