[PLUG] Daylight Savings Time

Linux Business linux at frankhunt.com
Sun Feb 11 19:58:22 UTC 2007


You can test your system to see if you need to update glibc

zdump -v PST8PDT | grep 2007

Terry Griffin wrote:
> On Sunday 11 February 2007 7:16 am, Rich Shepard wrote:
>>    An article in this morning's newspaper reminded me that the switch from
>> standard to daylight savings time is 11 March this year rather than the
>> first Sunday in April.
>>
>>    Do current kernel versions accommodate this change?
>>
>> Rich
> 
> The kernel doesn't care about DST, or even what time zone you are in. It
> always keeps time in UTC.
> 
> It's glibc that takes the UTC time from the kernel and converts it to local
> time when some app wants to know the local time. Included with glibc is a
> time zone database, usually packaged as tzdata. So as long as you are
> up to date with the latest tzdata package for your distro then you should
> be okay for March 11.
> 
> For older versions of Linux distros that are no longer supported, there are
> reports of success installing the tzdata package from a newer version of the
> same distro.
> 
> For some old distro versions tzdata was not packaged separately but instead
> was built in to the main glibc package. Again, there are reports of success
> doing a forced installation of a new tzdata package from a newer version of
> the same distro over the top of the old glibc.
> 
> In some cases simply upgrading tzdata is not enough. You may have to
> re-run the system's time-zone selection utility to assure that /etc/localtime
> is refreshed from the updated data base.
> 
> Terry
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> 

-- 
frank hunt
confused linux admin
part time windows(r) washer
way remote PLUG member-in-absentia
rochester hills, mi



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