Christen a BUGS section for an explanation of the impact of Daylight
Savings Time on cron(8). If we ever introduce some work-around code for handling jobs scheduled for a time that "doesn't happen" due to DST, the section should be renamed to IMPLEMENTATION NOTES. PR: 10947 Reported by: Scott Drassinower <scottd@cloud9.net> Submitted by: Seth Bromberger <seth@freebie.dp.ny.frb.org> Reviewed by: mpp
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@ -15,7 +15,7 @@
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.\" * Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
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.\" */
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.\"
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.\" $Id: crontab.5,v 1.8 1998/03/23 08:21:36 charnier Exp $
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.\" $Id: crontab.5,v 1.9 1999/07/27 16:39:02 n_hibma Exp $
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.\"
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.Dd January 24, 1994
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.Dt CRONTAB 5
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@ -223,3 +223,15 @@ feature can be turned off and no mail will be sent at all (SysV can't do this
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either).
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.Sh AUTHORS
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.An Paul Vixie Aq paul@vix.com
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.Sh BUGS
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If you're in one of the 70-odd countries that observe Daylight
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Savings Time, jobs scheduled during the rollback or advance will be
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affected. In general, it's not a good idea to schedule jobs during
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this period.
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.Pp
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For US timezones (except parts of IN, AZ, and HI) the time shift occurs at
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2AM local time. For others, the output of the
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.Xr zdump 8
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program's verbose
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.Fl ( v )
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option can be used to determine the moment of time shift.
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