[CentOS] yum and yumex change system time

[Richard]

> Date: Tuesday, June 23, 2015 03:48:36 PM -0400
> From: Jonathan Billings <billings at negate.org>
>
> On Tue, Jun 23, 2015 at 01:56:13PM -0500, g wrote:
>> each and every time i run yum or yumex, system time is advanced
>> by 5 hours.
>> 
>> this has gone on thru several updates, maybe even upgrades.
>> 
>> centos = 6.6 current
>> yum    = 3.2.29
>> yumex  = 3.0.5
>> 
>> for awhile, i did not mind resetting clock when i noticed it off.
>> 
>> now, it is a pita because when i forget, emails and what ever else
>> i am doing get wrong time stamps.
>> 
>> i have searched for problem/solution, but none found. or i missed
>> it reading search page.
>> 
>> most appreciative if anyone knows of a solution.
> 
> Hmmm, that's a really strange problem.
> 
> yum really doesn't have anything to do with your system clock.  It
> just installs, updates and removes packages.  I've never used
> 'yumex' but i assume it just runs yum behind the scenes.
> 
> The only thing I can think of is that your system is installing a
> tzdata package and failing, and somehow you're replacing the time
> zone with the original each time you fix it.  Since your date is
> listed as -0500, it would seem likely that it is related.

I agree, so my questions are:

   - what is your TZ?

   - what does "[/bin/]date" show?

   - what does your hardware clock: "/sbin/hwclock --show"  report?
      [need to be root to use that command]

   - is your /etc/localtime file a standalone file or a symlink
       to /usr/share/zoneinfo/... ?

      - if a symlink, to what file?

      - what is the timestamp on the localtime (or what it's
          symlinked to) file?

   - what does "zdump -v /etc/localtime" return ? i.e., is it for
      the correct TZ?