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Configure Monitor Frequency with Cron

When scheduling a monitor, besides picking one of the simple alternatives testRTC offers “out of the box”, you can express your own monitor’s frequency by using a cron expression.

A cron expression is a string consisting of six or seven subexpressions (fields) that describe individual details of the schedule.

These fields, separated by white space, can contain any of the allowed values with various combinations of the allowed characters for that field.

Cron syntax:

 ┌───────────── min (0 - 59)
 │ ┌────────────── hour (0 - 23)
 │ │ ┌─────────────── day of month (1 - 31)
 │ │ │ ┌──────────────── month (1 - 12)
 │ │ │ │ ┌───────────────── day of week (0 - 6) (0 to 6 are Sunday to
 │ │ │ │ │                  Saturday, or use names; 7 is also Sunday)
 │ │ │ │ │
 │ │ │ │ │
 * * * * *  command to execute

Examples:

*/30 * * * * Every 30 minutes

1 0 * * * Every day, at 00:01 AM

0 * * * * Every hour

*/5 * * * * Every 30 minutes

 

Online cron expression descriptor (Describe Cron expressions as human readable text): http://cronexpressiondescriptor.azurewebsites.net/

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