Today in this article, we will see a few examples of Running A Cron Job At A Time Every Hour/Minute/Second/Day.

Overall we will see examples in this article,

The naming common Pattern for Cron Jobs is as below,

*  *  *  * *

@1 – This indicates the time in minutes varies between 0 to 59 minutes (0 – 59). Anything above this, please use 2nd *parameters which lets you add hours-wise details.

@2 – This indicates the time in hours varies between 0 to 23 hours (0 – 23). Anything above this, please use 3rd *parameters which lets you add day-wise details.

@3 – This indicates the time in a day varies between 1 to 31 days of the month (1 – 31). Anything above this, please use 4th *parameters which lets you add month-wise details.

@4– This indicates the month varies between 1 to 12 months of the year (1 – 12). Anything above this, please use 2nd *parameters which lets you add hours-wise details.

@5 – This indicates the day of the week varies between 0 to 6 of a week. (0 – 6) (Sunday=0 or 7)

Here

• 0 = Sunday
• 1 = Monday
• 2 = Tuesday
• 3 = Wednesday
• 4 = Thursday
• 5 = Friday
• 6 = Saturday

 +---------------- minute (0 - 59)
 |  +------------- hour (0 - 23)
 |  |  +---------- day of month (1 - 31)
 |  |  |  +------- month (1 - 12)
 |  |  |  |  +---- day of week (0 - 6) (Sunday=0 or 7)
 |  |  |  |  |
 *  *  *  *  *  command to be executed

Running a Cron Running a cron job at 2:30 AM every day

Example – Cron every day on a given time

Cron job run at 2:30 AM every day

30 2 * * *

How to run a cron job every week on Sunday at 1.30 am

Example 2 – Cron every week on a particular day and time

Run a cron job every week on Sunday at 1.30 am

30 1 * * 0

How to run crontab job every hour

Below examples show running Crontab job every 3 hour

Example 3 – Cron every hour

* 3 * * *

below examples show running the Crontab job every hour

* 1 * * *

How to run crontab job every 30 minutes

Example 4

How to run crontab job every 30 minutes

0,30 * * * *

Other References :

• Curl POST JSON command examples – Guidelines

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