Date: Wed, 18 Jul 2007 09:33:19 +0700 (ICT) From: Olivier Nicole <on@cs.ait.ac.th> To: youshi10@u.washington.edu Cc: dmehler26@woh.rr.com, freebsd-questions@freebsd.org Subject: Re: cron job every 5 hours Message-ID: <200707180233.l6I2XJrw097658@banyan.cs.ait.ac.th> In-Reply-To: <469AFA30.4050504@u.washington.edu> (message from Garrett Cooper on Sun, 15 Jul 2007 21:55:12 -0700) References: <000f01c7c56d$da44d640$0200a8c0@satellite> <200707160427.l6G4Rb5q090225@banyan.cs.ait.ac.th> <469AFA30.4050504@u.washington.edu>
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> Something like: > > minute */5 * * * root path/to/scriptname > > will do the trick. > > Substitute the * in */5 for your desired start time (* being 0). > > -Garrett > > 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@cs.ait.ac.th> To: on@banyan.cs.ait.ac.th Subject: test crontab 5 hours X-Virus-Scanned: on CSIM by amavisd-milter (http://www.amavis.org/) This is a test for crontab Only way to run a job every 5 hours is with at(1). Best regards, Olivier
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