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Cron

Cron is the scheduler on Unix-like systems that runs commands automatically at times set by a five-field schedule expression.

Last reviewed: 2026-10-03

In more detail

The fields are minute, hour, day of month, month and day of week, with * meaning "every" and */5 "every five". For example 30 2 * * 1-5 runs at 02:30 on weekdays. Cron uses the server's time zone, which is a common source of surprises around daylight saving changes.

Try these tools

Cron Expression Explainer

Paste a 5-field cron expression and get a plain-English explanation plus the next 5 scheduled run times.

In more detail

Try these tools

Cron Expression Explainer

See also