HP-UX Reference (11i v1 00/12) - 1M System Administration Commands A-M (vol 3)
__________________________________________________________________________________________________________________________________________________________________________________________________
__________________________________________________________________________________________________________________________________________________________________________________________________
STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1m/!!!intro.1m
________________________________________________________________
___ ___
c
cron(1M) cron(1M)
For the period of 1:00 a.m. to 4:00 a.m. on the days of DST transition, the results will be:
Job Times Run in Fall Times Run in Spring
Job_1 01:00 MDT 01:00 MST
Job_2 02:00 MDT 03:00 MDT
Job_3 03:00 MST 03:00 MDT
Job_4 04:00 MST 04:00 MDT
Job_hourly 01:00 MDT 01:00 MST
02:00 MDT
02:00 MST
03:00 MST 03:00 MDT
04:00 MST 04:00 MDT
Multiple_1 02:00 MDT
03:00 MST 03:00 MDT
04:00 MST 04:00 MDT
Multiple_2 02:00 MDT 03:00 MDT
04:00 MST 04:00 MDT
WARNINGS
In the Spring, when there is a nonexistent hour because of daylight savings time, a command that is
scheduled to run multiple times during the nonexistent hour will only be run once. For example, a com-
mand scheduled to run at 2:00 and 2:30 a.m. in the MST7MDT time zone will only run at 3:00 a.m. The
command that was scheduled at 2:30 a.m. will not be run at all, instead of running at 3:30 a.m.
DEPENDENCIES
HP Process Resource Manager
If the optional HP Process Resource Management (PRM) software is installed and configured, jobs are
launched in the initial process resource group of the user that scheduled the job. The user’s initial group is
determined at the time the job is started, not when the job is scheduled. If the user’s initial group is not
defined, the job runs in the user default group (PRMID=1). See prmconfig(1) for a description of how to
configure HP PRM, and prmconf(4) for a description of how the user’s initial process resource group is
determined.
AUTHOR
cron was developed by AT&T and HP.
FILES
/var/adm/cron Main cron directory
/var/spool/cron/atjobs
Directory containing at and batch job files
/var/spool/cron/crontabs
Directory containing crontab files
/var/adm/cron/log Accounting information
SEE ALSO
at(1), crontab(1), sh(1), init(1M), queuedefs(4), tztab(4).
HP Process Resource Manager: prmconfig(1), prmconf(4) in HP Process Resource Manager User’s Guide.
STANDARDS CONFORMANCE
cron: SVID2, SVID3
HP-UX Release 11i: December 2000 − 2 − Section 1M−−151
___
___