Run cron job every two seconds

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#1 Mon, 05/02/2011 - 13:18

Run cron job every two seconds


I wonder how I can set a cron job to run every two seconds. Under "Webmin > System > Scheduled cron job" I can set a script to run every minute, but not every two seconds.

How do I accomplish this?

Greetings Fredrik-s

Mon, 05/02/2011 - 14:37

Just read that this is not possible.

One work around is to make a loop with a sleep function. Counting down.

Mon, 05/02/2011 - 16:37


Yeah, you're correct, Cron doesn't handle frequencies less than one per minute.

As you saw -- the only way to do that would be to write some code of your own that handled running your program every two seconds.


Tue, 05/03/2011 - 16:14

Considering that cron needs to start processes for the tasks it performs, it'd probably not be a good idea to have it run something every two seconds, even if it was possible. :)

A loop script that stays active and yields CPU cycles for two seconds each time it finishes its thing is much better.

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