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Date:      Mon, 5 Nov 2001 19:04:46 +0100
From:      Cliff Sarginson <cliff@raggedclown.net>
To:        freebsd-questions@FreeBSD.ORG
Subject:   Re: A cron job to run every 4 weeks
Message-ID:  <20011105190446.B5055@raggedclown.net>
In-Reply-To: <3.0.5.32.20011105095910.01006480@mail.sage-american.com>; from jacks@sage-american.com on Mon, Nov 05, 2001 at 09:59:10AM -0600
References:  <20011105161130.C3639@raggedclown.net> <512fe501a6.501a6512fe@mbox.com.au> <3.0.5.32.20011105075659.01006480@mail.sage-american.com> <008201c16607$1e2f5ff0$fa01a8c0@ABERRATION> <20011105161130.C3639@raggedclown.net> <20011105163350.A4161@raggedclown.net> <3.0.5.32.20011105095910.01006480@mail.sage-american.com>

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On Mon, Nov 05, 2001 at 09:59:10AM -0600, jacks@sage-american.com wrote:
> Cliff: What exactly would the "at" lines be that preceded a command, as an
> example.... I would be interested in that myself.
> 
Here is an example:

# An "at" job that re-runs itself every 4 weeks
# Command example is "date"
# This should set up the at job for the future,
# then run the date command

at -f $0 now + 4 weeks
date

# End of example

Then using "atq" you see:

1       2001-12-03 18:57 a root

Today is November 5th
November 5th + 4 weeks = December 3rd

The initial run can be specified on the first
invocation, say the script is called "foo"

at -f foo time_spec

See the manual page for details of "time-spec",
it has some extensive options (even bizarre ones
like "teatime" I seem to recall).

-- 
Regards
Cliff



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