[ntp:questions] ntpdate off by one hour in older redhat server

Danny Mayer mayer at ntp.isc.org
Wed Oct 31 17:18:42 UTC 2007


Brian Utterback wrote:
> Richard B. Gilbert wrote:
>> joe wrote:
>>> Hello I am trying to sync the date on my older redhat machines and it
>>> seems like daylight savings are not working. I tried replacing the
>>> localtime file with the NewYork file but no changes. This is the
>>> output from ntpdate
>> ntpd has NOTHING, repeat NOTHING, to do with daylight savings time!
>> Daylight savings time is a figment of your imagination.  It is a common 
>> hallucination but still a hallucination.
>>
>> NTP deals ONLY in UTC (formerly known as Greenwich, or GMT).
>>
>> Local time is calculated by the operating system using the rules for 
>> your local area.  The politicians just love to change the rules every 
>> year or so, so be sure you have the correct rules for THIS year and the 
>> place where you live!
>> <snip>
>>
> 
> Right, what Richard said. Since you said that you tried replacing the
> localtime file with the NewYork file, I presume that you are in the
> Eastern US timezone. Since you also said that this only effected your
> older Red Hat systems, and because this week marks the one week this
> year where daylight savings time is still in effect while it was not
> in previous years, I will go out on a limb here and suggest that the
> time zone files on your systems are out of date and have not been
> updated.
> 
> Brian Utterback

And if you are running a chroot jail then you need to do the same for that.

Danny



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