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sync date with NTPd

Posted on 2011-10-01
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Last Modified: 2013-12-16
hello,
I am on EST time using centos v5.7 and right now its 1.56pm I started the NTPd service

service ntpd start
chkconfig ntpd on

then I check and this is what I get

[(12:20 PM)][(root@critical)] [(~)] $ date
Sat Oct  1 12:56:03 EST 2011

how can I fix the date?
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Question by:XK8ER
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6 Comments
 
LVL 21

Expert Comment

by:Papertrip
ID: 36897342
The correct timezone currently is actually EDT, and that is why your server is showing 1 hour off.

Change/confirm your timezone by using tzselect
[root@broken etc]# tzselect
Please identify a location so that time zone rules can be set correctly.
<snip>
The following information has been given:

        United States
        Eastern Time

Therefore TZ='America/New_York' will be used.
Local time is now:      Sat Oct  1 14:13:48 EDT 2011.
Universal Time is now:  Sat Oct  1 18:13:48 UTC 2011.
Is the above information OK?

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Author Comment

by:XK8ER
ID: 36897393
that doesnt change the time for the system, this is what I get.


You can make this change permanent for yourself by appending the line
        TZ='America/New_York'; export TZ
to the file '.profile' in your home directory; then log out and log in again.

Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
America/New_York
[(01:23 PM)][(root@alpha)] [(~)] $ date
Sat Oct  1 13:23:50 EST 2011

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LVL 21

Accepted Solution

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Papertrip earned 500 total points
ID: 36897430
My apologies you are correct, I didn't fully complete the test when I ran it on my server.  All that shows you is which value you should be using but doesn't actually change it.  I had thought it would change /etc/localtime, so let's just do that manually.
[root@broken America]# pwd
/usr/share/zoneinfo/America
[root@broken America]# date
Sat Oct  1 11:54:32 PDT 2011
[root@broken America]# cp -p New_York /etc/localtime
cp: overwrite `/etc/localtime'? y
[root@broken America]# date
Sat Oct  1 14:54:20 EDT 2011

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If that does the trick, then change /etc/sysconfig/clock to match
[root@broken America]# cat /etc/sysconfig/clock
ZONE="America/New_York"

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LVL 1

Author Comment

by:XK8ER
ID: 36897436
ok, the time is now correct.. now when the time changes into daylight saving.. would it change automatically?
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LVL 21

Expert Comment

by:Papertrip
ID: 36897447
Yes it will.

You may want to restart any applications that could have the old TZ cached.  I have never changed the timezone on a server apart from during the install, so I'm not sure of the repercussions of doing it on the live system.

If you are able to reboot the machine, that would be the safest, but is probably unnecessary... your call on that.
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LVL 1

Author Comment

by:XK8ER
ID: 36897456
I think crond would be the only service that needs to restart so that it can rotate the logs right at 4am.. other than that when I change the date its all good.
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