topic Re: Daylight activity in Operating System - HP-UX

Daylight activity

Madhu_17 — Mon, 24 Oct 2005 09:24:21 GMT

Hello Friends,

We are supporting one HP server of belgium. How to go with the daylight savings for this server.

Pls find the date command outpur for your ref.

#date
Mon Oct 24 16:37:24 METDST 2005

#cat TIMEZONE
TZ=MET-1METDST
export TZ

Thanks..

Re: Daylight activity

Arunvijai_4 — Mon, 24 Oct 2005 09:30:08 GMT

http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=967582

This should be helpful..

-Arun

Re: Daylight activity

Madhu_17 — Mon, 24 Oct 2005 09:34:11 GMT

As I am not that much confident on HP-UX,
Can anybody give me step-by-step commands

Thanks in advance..

Re: Daylight activity

Orhan Biyiklioglu — Mon, 24 Oct 2005 09:36:49 GMT

Your timezone setup seems correct. If your tztab file contains the information for the MET timezone like the following:

#grep MET /usr/lib/tztab
MET-1METDST
0 3 25-31 3 1983-2038 0 METDST-2
0 2 24-30 9 1983-1995 0 MET-1
0 2 25-31 10 1996-2038 0 MET-1

Your timezone will be automatically changed from METDST to MET on October 30th.

hth

Re: Daylight activity

Madhu_17 — Mon, 24 Oct 2005 09:40:06 GMT

Yes.. my tztab file is having entries as specified by you for "-1METDST".

Hope my server will get effected automatically.. Pls confirm..

Thanks

Re: Daylight activity

James R. Ferguson — Mon, 24 Oct 2005 09:41:52 GMT

Hi Madhu:

Your timezone involves a daylight savings change. If you look at the manpages for 'tztab' and match your timezone to the stanza in '/usr/lib/tztab' you can see exactly when your time change will occur.

# man tztab
# cat /usr/lib/tztab

Regards!

...JRF...

Re: Daylight activity

James R. Ferguson — Mon, 24 Oct 2005 09:47:27 GMT

Hi Madhu:

Your server will behave quite fine. You can find some additional information regarding daylight savings time changes and 'cron' in the manpages for 'cron'.

Regards!

...JRF...

Re: Daylight activity

Pete Randall — Mon, 24 Oct 2005 09:48:15 GMT

You have to remember that the actual time does not change, just the way it is displayed. With your tztab entries, it will revert to standard time automatically.

Pete

Re: Daylight activity

Madhu_17 — Mon, 24 Oct 2005 09:52:39 GMT

Thanks James..

Pete, your reply is little bit confusing to me.. what happens on 30 th oct at 3 AM??

Will my date command shows 3 AM after that or 2 AM??

Thanks

Re: Daylight activity

Hanwant Verma_1 — Mon, 24 Oct 2005 09:54:32 GMT

Check this thread

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=967177

Hanwant

Re: Daylight activity

Pete Randall — Mon, 24 Oct 2005 09:59:58 GMT

See the section titled "Spring and Autumn Time Transitions" in the cron man page to see how jobs are affected by the time shift.

Pete

Re: Daylight activity

Orhan Biyiklioglu — Mon, 24 Oct 2005 10:00:34 GMT

Your date command output will change from 02:59 to 02:00.

Re: Daylight activity

Madhu_17 — Mon, 24 Oct 2005 10:07:32 GMT

Thanks all..

So, i do not need to do any thing on that day.. simply if i check it would be okay.. correct me if i am wrong..

Thanks

Re: Daylight activity

Pete Randall — Mon, 24 Oct 2005 10:08:22 GMT

No, you don't have to do anything.

Pete

Re: Daylight activity

Hanwant Verma_1 — Mon, 24 Oct 2005 10:15:46 GMT

No points assigned.

Hanwant

Re: Daylight activity

Madhu_17 — Mon, 24 Oct 2005 10:43:03 GMT

Thanks all for your valuable suggestions.