10 More Discussions You Might Find Interesting
1. AIX
Hi Everyone
Just wanted to share with you that IBM AIX is having again problem with Summer Time Shift..
IBM Possible Action Required: System time may not change properly at DST start/end dates on AIX 7.1 and AIX 6.1 - United States
For me it means some additional overtimes in the... (0 Replies)
Discussion started by: gito
0 Replies
2. UNIX for Advanced & Expert Users
Hi,
I have one confusion regarding DST chnages which are going to happen after October. :confused: :confused:
I have few jobs on Autosys which run as per Japan Time. they shoudl not be affected by switiching off of DST time.
Our autosys instance server is based on UK which is running on... (0 Replies)
Discussion started by: girdharsourabh
0 Replies
3. Shell Programming and Scripting
Is there a way to figure out if given date is in DST or in EST? So imagine a shell script is_date_dst.sh
sh is_date_dst.sh 2009-03-02 would return 0 and
sh is_date_dst.sh 2009-03-22 would return 1
This script should not assume the timezone of the machine it runs on, but only the date passed... (7 Replies)
Discussion started by: asriva
7 Replies
4. Linux
Hello,
I have linux server which is one hour behind after the DST change last week. I post some information below on the settings. any helpwould be helpful since I am newbie..
$ clock
Tue 04 Nov 2008 03:12:26 PM EST -0.785549 seconds
$more clock
Tue 04 Nov 2008 03:12:26 PM EST... (2 Replies)
Discussion started by: jbdavis02@yahoo
2 Replies
5. What is on Your Mind?
We have been discussing the 2007 changes to DST (Daylight Saving Time) for some time now. We hope that everything went well. But did it? Let us know by voting or by posting your experiences here. The poll will automatically close in 45 days. (6 Replies)
Discussion started by: Perderabo
6 Replies
6. Solaris
How to update DST patch. Whatat are the necessary steps that have to be taken on the servers to update this patch?. (1 Reply)
Discussion started by: sandeepkv
1 Replies
7. UNIX for Dummies Questions & Answers
Hello,
Does anyone know how can I verify if the DST update on a SCO Unixware system has been installed successfully? UNIXWARE 7.1.4 MP3
Looking forward to some help, please....
Thanks (8 Replies)
Discussion started by: Yorgy
8 Replies
8. SCO
Hello,
Anyone know where I can find the DST updates for SCO Xdesktop 3.6.3?
Thanks (0 Replies)
Discussion started by: ddzc
0 Replies
9. SCO
I checked SCO's site for DST fix for SCO 5.0.0 and there iis not one available. Can I run a script in the cron to read in and change the time?
TiA (2 Replies)
Discussion started by: tbgeek
2 Replies
10. Solaris
I have several servers that are outside the country and are running Solaris 6 mainly with a few Solaris 7 boxes here and there. Because of that, we need to schedule time to change the time on March 11th and again in April, October and November. At least until the customer decides it's time to... (3 Replies)
Discussion started by: BOFH
3 Replies
cron(1M) cron(1M)
NAME
cron - timed-job execution daemon
SYNOPSIS
DESCRIPTION
executes commands at specified dates and times. Regularly scheduled commands can be specified according to instructions placed in files.
Users can submit their own files with a command (see crontab(1)). Users can submit commands that are to be executed only once with an or
command.
Since never exits, it should be executed only once. This is best done by running from the initialization process with the startup script
(see init(1M)).
only establishes a schedule for files and or command files during process initialization and when it is notified by or that a file has been
added, deleted, or modified.
When executes a job, the job's user and group IDs are set to those of the user who submitted the job.
Spring and Autumn Time Transitions
On the days of daylight savings (summer) time transition (in time zones and countries where daylight savings time applies), schedules com-
mands differently from normal.
In the following description, an ambiguous time refers to an hour and minute that occurs twice in the same day because of a daylight sav-
ings time transition (usually on a day during the Autumn season). A nonexistent time refers to an hour and minute that does not occur
because of a daylight savings time transition (usually on a day during the Spring season). DST-shift refers to the offset that is applied
to standard time to result in daylight savings time. This is normally one hour, but can be any combination of hours and minutes up to 23
hours and 59 minutes (see tztab(4)).
When a command is specified to run at an ambiguous time, the command is executed only once at the occurrence of the ambiguous time.
When a command is specified to run at a nonexistent time, the command is executed after the specified time by an amount of time equal to
the DST-shift. When such an adjustment would conflict with another time specified to run the command, the command is run only once rather
than running the command twice at the same time.
Commands that are scheduled to run during all hours (there is a is in the hour field of the entry) are scheduled without any adjustment.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified or is set to the empty string, it defaults to "C" (see lang(5)). If any internationalization variable contains an
invalid setting, all internationalization variables default to "C" (see environ(5)).
DIAGNOSTICS
A history of all actions taken by is recorded in
EXAMPLES
The following examples assume that the time zone is In this time zone, the DST transition occurs one second before 2:00 a.m. and the DST-
shift is 1 hour.
Consider the following entries in a file:
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 command scheduled to run at 2:00 and 2:30 a.m. in the 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 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
was developed by AT&T and HP.
FILES
Main directory
Directory containing and job files
Directory containing files
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
STANDARDS CONFORMANCE
cron(1M)