[sdnog] Impact of new timezone in Sudan

[Manhal Mohammed]

I hope if Admins can give us a feedback about their experience on this after the changes
"Problems and how they dealt with it "So it can be a document for future cases
^_^

Thank you Mr Philip for guiding us on this historical "hour " :)


"Hope to find you all well  after 21 minutes "


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On 31 Oct 2017, at 19:18, Philip Paeps <philip at trouble.is<mailto:philip at trouble.is>> wrote:

On 2017-10-31 15:13:46 (+0100), Manhal Mohammed wrote:

This will be a great help for admins who run freeBSD also ISPs in sudan " most of their servers run freeBSD as I know"
Hope this discussion find them on time ^_^

Happy to help. :) Glad they like FreeBSD. :)

"I will install a FreeBSD on a VM just to try it out "
Can we do the same for Linux?

Linux is a mess. Every distribution is different and I have no idea which ones have updated their timezone databases and whether they push updates to supported releases.

If in doubt, you can probably update your timezone manually. Note, I have not tested this on any actual Linux system:

% wget https://www.iana.org/time-zones/repository/releases/tzdata2017c.tar.gz
% mkdir tzdata2017c && tar -C tzdata2017c -zxvf tzdata2017c.tar.gz
% zic -d zoneinfo tzdata2017c/africa
# su
[root password]
# cp zoneinfo/Africa/Khartoum /usr/share/zoneinfo/Africa/Khartoum


Some Linux systems also install a copy of the timezone data to /etc/localtime instead of a symlink. Make sure you actually use the new timezone data:

# ln -sf /usr/share/zoneinfo/Africa/Khartoum /etc/localtime


Check that your system is correct:

# zdump -v Africa/Khartoum | grep 2017
Africa/Khartoum  Tue Oct 31 20:59:59 2017 UTC = Tue Oct 31 23:59:59 2017 EAT isdst=0 gmtoff=10800
Africa/Khartoum  Tue Oct 31 21:00:00 2017 UTC = Tue Oct 31 23:00:00 2017 CAT isdst=0 gmtoff=7200


Note that if you make manual changes, some Linux systems might get cranky when you try to update it later. Or if might silently replace your corrected timezone data with outdated timezone data next time you update.

Good luck. :)

Philip

--
Philip Paeps
Senior Reality Engineer
Ministry of Information

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