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Old 04-30-2008, 12:50 AM   #1
r_etemaadi
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Change timezone DST


I'm using webmin on fedora. And set the time sync with a ntp pool (asia.pool.ntp.org) but in my timezone (Tehran) now daylight saving is active but it is not active in time synchronization.
I found a file in (/use/share/zoneinfo) in folder Asia that named Tehran, how can I change that to correct settings?
 
Old 04-30-2008, 01:08 AM   #2
blacky_5251
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There is a graphical tool in Fedora that lets you define the timezone you live in. The effect of the tool is to change the file /etc/localtime to point to the appropriate file in /usr/share/zoneinfo. You can achieve the same thing by manually linking your timezone file into /etc like this:-
Code:
ln -s /usr/share/zoneinfo/Asia/Tehran /etc/localtime
The Tehran file should have been created with daylight savings in mind.
 
Old 04-30-2008, 01:26 AM   #3
r_etemaadi
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I know that Tehran file should have daylight saving in itself. But it hasn't this setting. How can I change it and put this setting in file?
 
Old 04-30-2008, 01:58 AM   #4
blacky_5251
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As you've probably worked out, these files are binary files and have been created by compiling timezone data using specific software. To be frank, I don't know how to edit the source files or what the program is that creates the binary files for distribution.

Is DST new in Tehran or has it been used for a long time? If it is new then you can probably download an update to the zoneinfo data files. If it has been used for a long time, then perhaps you should lodge a bugzilla report to Fedora about the fact.

Which version of Fedora are you using?
 
Old 04-30-2008, 02:03 AM   #5
blacky_5251
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Check this out: - http://www.cs.cmu.edu/~help/dst/sola...x_systems.html

And run -
Code:
man zic

Last edited by blacky_5251; 04-30-2008 at 02:06 AM.
 
Old 05-01-2008, 12:27 AM   #6
r_etemaadi
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Thanks a lot for your hints dear sir,

I update tzdata package and the problem solved.
 
  


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