Date: Sun, 19 Sep 2004 20:04:40 +0000 From: Benjamin Sobotta <mayday@gmx.net> To: robg <robg.list@gmail.com> Cc: freebsd-newbies@freebsd.org Subject: Re: can someone explain crontab to me better? Message-ID: <200409192004.40547.mayday@gmx.net> In-Reply-To: <5c389d3b040919104228593a14@mail.gmail.com> References: <5c389d3b040919104228593a14@mail.gmail.com>
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Hi! Those entries have nothing to do with duration. The entry of you would run every two hours or better every even hour and then every 5 minutes like: 8:00 8:05 8:10 . 8:55 10:00 10:05 10:10 . . . so if you want something to run every two hours it should look like 10 */2 * * * root /usr/libexec/locate.updatedb This would make it run like 8:10 10:10 12:10 . . I hope this helps - and works :) Haven't tried it. Cheers, Ben On Sunday 19 September 2004 17:42, robg wrote: > hi, > > i am having a hard time understanding crontab after reading > http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/configtuning-cron >.html .. i still can't understand the minutes/hours... > > when you specify minutes, does it mean the command is run every X > minutes? and if you specify a hour AND minutes, the command is run > every X hours for X minutes? so if i did > > */5 */2 * * * root /usr/libexec/locate.updatedb > > it would run that command every two hours for 5 minutes? so when two > hours comes around, itll keep running that command over and over for 5 > minutes? or will it run that command once every 5 minutes for two > hours? im confused > > i just want to know the syntax to run something every 2 hours once .. > can someone clarify this > > thanks
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