Giveaway timer cron job with crontab

Phoy Timed Cron job with Crontab (or full name Cron Table)

Finish reading, enter Crontab by yourself. No need to reconcile the tool. See this photo is enough!

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Many people will use Cron Job as a program to set the time to automation, such as CI / CD. If you set the time to work, you need Crontab to tell when to run this.

⏰ by setting the time using Crontab, there are 5 fields used to set the time:

1. Minute: Min. The insertable value is 0 - 59.

2. Hours: hours. Enter 0 - 23.

3. Days of the month: This is a calendar date, for example, on this day 1, the insertable value will be 1 - 31.

4. Month: Month. Of course there are 12 months. Put 1 - 12.

5. Days of the week: Days of the week, such as Monday, 0-6, starting from Sunday, will be 0, Monday is 1 until Saturday is 6, and 7 will be Sunday in some systems.

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Entering a time value. Besides putting a number directly.

Other syntaxes can also be inserted.

- *: Every minute, for example. If in the field, every minute means

-,: Use the separator for cases that need to put more than 1 value in the field, such as weekdays. Enter 1,2,3,4,5.

- -: You can also put a range, for example, on weekdays, 1-5.

- * / n: Every n times, n must be divisible by, for example, in the field of minutes, 60 must be divisible by hours, and n is divisible by 60 (for minutes) or 24 (for hours).

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The use of the face will look like this.

'< minute > < hour > < day of month > < month > < day of week > < command to execute >'

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⭐ basic example

- Every day at 6pm, '0 18 * * *'

- Every Monday at 6pm, '0 18 * * 1'.

- Day 3 at 6 p.m. of every month. '0 18 3 * *'

⭐ a little harder example.

- Every Saturday at 5 p.m., 50 minutes. '50 23 * * 6'

- Every 1st and 16th day of every month at half past three o'clock, '30 15 1,16 * *'

- Every weekday at 7: 30 7 * * 1,2,3,4,5 'or' 30 7 * * 1-5 '.

- Every 30 minutes of every working day '* / 30 * * * 1,2,3,4,5' or '* / 30 * * * 1-5' as well.

- Every 4 hours. Minute 0 '0 * / 4 * * *'

- Every 2 hours from 9: 30 to 18: 30 '30 9-18/2 * * *'

- First Minute of the New Year Every Year '0 0 1 1 *'

- Every hour from 10 a.m. to 6 p.m. on Saturday Sunday '0 10-18 * * 6-7'

- Every minute there's her '* * * * *'

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I'm not sure what my friends are doing or what interesting examples I can tell you. We haven't used it for a long time.

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