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Red Hat Enterprise Linux 4 reports incorrect time zone via telnet

Posted on 2007-03-19
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Last Modified: 2013-12-16
Since the new DST went into effect, my Red Hat Enterprise ES 4 machines have the correct system time reflected as being in EDT (eastern daylight time).

However, if you telnet into the same machine, the time is reported one hour slow, with EST (eastern standard time) showing before the year.

An SSH session to the same machine reports the time correctly as EDT.

Is there another update I need for these systems?  I have already made the appropriate DST patches.

Thanks.
Travis
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Question by:travbeav
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7 Comments
 
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Expert Comment

by:Tintin
ID: 18751884
Are you saying that when you login via telnet and run the 'date' command, it shows the timezone as EST and when you login via ssh and run the 'date' command it shows the timezone as EDT?

Are you logging in as the same user?
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Author Comment

by:travbeav
ID: 18751928
Yes, you are correct.

When logged into the terminal as root, the date command shows up as EDT. Any telnet session shows up as EST.

We have submitted a sys report to Red Hat, but I was hoping someone could give me an answer sooner. The machine has already been rebooted. It is effecting all of our RHEL 4 machines.....note: these were already patched for DST a few weeks ago.
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Accepted Solution

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Tintin earned 500 total points
ID: 18752141
If you login as a standard user on the console, do you still get EST?

I'm wondering if you have TZ setting hardcoded in the root profile or /etc/profile or similiar.
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Author Comment

by:travbeav
ID: 18758598
Hi everyone,

We have narrowed down the problem. Only users who authenticate with WINBIND (against our Win2k active directory) are experiencing this problem.  Local accounts to the box (including root) do not have this issue.

Again, the issue is as follows:  when issuing the DATE command, local users get "EDT" which is the correct TZ. If a winbind user logs in, they get "EST" as their time zone, and the system time is rolled back one hour for these users.

Any ideas on how adjust TZ settings for users authenticating with WINBIND?

Thanks,
Travis
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Author Comment

by:travbeav
ID: 18901898
One of our engineers had entered a manual "set TZ EST" entry into the common cshrc file that everyone uses, overriding the EST of the actual system clock. I finally found the problem.

Please go ahead and close this question out.
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LVL 48

Expert Comment

by:Tintin
ID: 18902014
Well, I guess I was on the right track when I mentioned checking /etc/profile.

Do all your users have csh or tcsh as their default shell?  That's certainly unusual.
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Author Comment

by:travbeav
ID: 19080496
Yes, the engineers here love csh and that's all they use.  

I will accept your answer as you did mention checking the user's profile.
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