time & egypt

[Ahmed Kamal]

I havent been following the thread closely, but seeing there's a lot of
fuss, here's my understanding. Standard *nix boxes set hardware clock to
UTC, which is optionally sync'ed over NTP to make sure it's precise. The TZ
database, keeps track of different time offsets for different countries.
Thus both NTP and TZ DB are needed for accurate time keeping. NTP is
not necessary however assuming your hardware clock doesn't drift as much.
Contrarily, Windows boxes (being designed for personal computing from day
one) keep hardware clock at local time offset (not UTC)


On Mon, Apr 25, 2011 at 6:08 PM, Angie T. Muhammad
<angie.tawfik at gmail.com>wrote:

> Yep, but what about when an internet connection is not available ? OS
> timing should precise indeed.
>
> On 4/24/11, أحمد فيصل <ahmedfaissl at gmail.com> wrote:
> > *I always use NTP in every installation, no matter what distro I use, no
> > changes to be made but also no need for any and it updates automatically
> as
> > I said before..*
> >
> > On Sun, Apr 24, 2011 at 7:11 PM, Angie T. Muhammad
> > <angie.tawfik at gmail.com>wrote:
> >
> >> Correction /* Qutoing TZdata maintainer David Olson */ :
> >>
> >> Given the short notice on the Egyptian changes...if no problems are
> found,
> >>>
> >>> the ftp site will be updated on 2011-04-25.
> >>>
> >>>
> >> So we should make sure Ubuntu maintainers create their tzdata package
> >> after
> >> this date to reflect the update on the Egyptian time.
> >> Sorry for mentioning April 20th at first. I didn't check all the
> messages
> >> then.
> >>
> >> On Sun, Apr 24, 2011 at 7:01 PM, Angie T. Muhammad <
> angie.tawfik at gmail.com
> >> > wrote:
> >>
> >>> I did a short research. The original TZ data mailing list is aware of
> >>> cancelling daylight saving in Egypt.
> >>>
> >>> Check out:
> >>> http://article.gmane.org/gmane.comp.time.tz/3750
> >>> http://news.gmane.org/gmane.comp.time.tz
> >>>
> >>> The mailing list can be contacted on:
> >>> tz at elsie.nci.nih.gov
> >>>
> >>> However, I guess Ubuntu maintainers should be informed of the update
> >>> unless they [ would package | have packaged ] tzdata after April 20th
> >>> when
> >>> tzdata mailing list was originally informed. However, informing Ubuntu
> >>> maintainers of something they might already know is much better than
> >>> having
> >>> Ubuntu not properly showing time for Egypt.
> >>>
> >>> Regards,
> >>>
> >>>
> >>> On Sun, Apr 24, 2011 at 5:12 PM, Amahdy <mrjava.javaman at gmail.com>
> wrote:
> >>>
> >>>> For Ubuntu users, there are two types of possible timing system:
> >>>>
> >>>> 1] tzdata which reads the information from
> >>>> /usr/share/zoneinfo/Africa/Cairo, this is updated manually by Ubuntu
> >>>> maintainer.
> >>>> 2] NTP which reads from an internet server, it has an automated
> >>>> algorithm to change in specific dates, regardless any local
> situations.
> >>>>
> >>>> Micro$oft uses #2, Ubuntu uses #1 by default (you can change it), #2
> >>>> looks more professional but very hard to make change, while in #1 you
> >>>> can
> >>>> simply fill a request to patch the timezone to be adjusted based on
> the
> >>>> local situation.
> >>>>
> >>>> You can detect weather your system is using NTP or not by looking
> >>>> weather
> >>>> the package "ntp" is installed, and the file /etc/ntp.conf exists. You
> >>>> may
> >>>> run "ntpdate" for server info (if not installed then no server will be
> >>>> available)
> >>>>
> >>>>
> >>>> Ok now my answer to the email :)
> >>>> If your Ubuntu is using #1 (the default), and the maintainer was never
> >>>> notified about any changes about our local time, then nothing will
> >>>> happens w
> >>>> Allah a3lm :))
> >>>>
> >>>> Cheers!
> >>>>
> >>>>
> >>>> -- Amahdy AbdElAziz
> >>>> http://www.linkedin.com/in/amahdyabdelaziz
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> On Sun, Apr 24, 2011 at 16:55, <ahmadtarek at gmail.com> wrote:
> >>>>
> >>>>> I think this issue need study to know what will be affected. Not only
> >>>>> computers but also web services - like google - mobile phones,
> watches
> >>>>> and a
> >>>>> lot of other things. If any one got a problem I thuink any country
> with
> >>>>> +2
> >>>>> timezone and without summer time would work with him.
> >>>>>
> >>>>>
> >>>>> Ahmad Tarek
> >>>>>
> >>>>> -----Original Message-----
> >>>>> From: Mohamed Zaian <Extend at tecmina.com>
> >>>>> Sender: ubuntu-eg-bounces at lists.ubuntu.com
> >>>>> Date: Sun, 24 Apr 2011 16:01:39
> >>>>> To: Ubuntu Egypt<ubuntu-eg at lists.ubuntu.com>
> >>>>> Reply-To: Ubuntu Egypt <ubuntu-eg at lists.ubuntu.com>
> >>>>> Subject: Re: time & egypt
> >>>>>
> >>>>> --
> >>>>> Ubuntu-eg mailing list
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> >>>>>
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> >>>>>
> >>>>
> >>>>
> >>>> --
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> >>>>
> >>>>
> >>>
> >>>
> >>> --
> >>> All the best,
> >>> Angie T. Muhammad
> >>> http://angie-tawfik.blogspot.com
> >>>
> >>>
> >>
> >>
> >> --
> >> All the best,
> >> Angie T. Muhammad
> >> http://angie-tawfik.blogspot.com
> >>
> >>
> >> --
> >> Ubuntu-eg mailing list
> >> Ubuntu-eg at lists.ubuntu.com
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> >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-eg
> >>
> >>
> >
>
>
> --
> All the best,
> Angie T. Muhammad
> http://angie-tawfik.blogspot.com
>
> --
> Ubuntu-eg mailing list
> Ubuntu-eg at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-eg
>
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