cron job every 5 hours
on at cs.ait.ac.th
Wed Jul 18 02:33:23 UTC 2007
> Something like:
> minute */5 * * * root path/to/scriptname
> will do the trick.
> Substitute the * in */5 for your desired start time (* being 0).
> PS crond won't do 5 hours and every x number of minutes per job (5 hours
> + x mins from end to start), just a flat amount of time (5 hours apart
> from start to start). If you need that type of 'precision', at will
> solve that like Olivier said if you place it at the end of the command.
I am afraid not.
*/5 means on every hours that is a multiple of 5, not every five
hours. So it will run every day at hour 0, 5, 10, 15 and 20. Between
hour 20 one day and hour 0 the next day there is only 4 hours, not
the "every 5 hours" requested.
Just to confirm that I launched a cron job yesterday:
23 */5 * * * /home/java/on/crontest
It ran at 15:23, 20:23 and today at 0:23 and 5:23 and so on:
Date: Wed, 18 Jul 2007 05:23:00 +0700 (ICT)
From: Olivier Nicole <on at cs.ait.ac.th>
To: on at banyan.cs.ait.ac.th
Subject: test crontab 5 hours
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This is a test for crontab
Only way to run a job every 5 hours is with at(1).
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