Expression Explainer

What Does */30 * * * * Mean?

*/30 * * * *

Every 30 minutes

Explanation

The */30 in the minute field means "every 30th minute" (0, 30).

Field Breakdown

Field Value Meaning
Minute (0-59)*/30Every 30 minutes
Hour (0-23)*Every hour
Day of month (1-31)*Every day of the month
Month (1-12)*Every month
Day of week (0-6)*Every day of the week

Common Use

*/30 * * * * /path/to/your/script.sh

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