synchonize time in centos (urgent)

tdnguyenitvn · 10-26-2009, 11:05 PM

Dear All,

I'm using VPS with OS CentOS to hosting website, but the time can not synchronize with my time zone.

Who can help me?

Thank you.

foodown · 10-26-2009, 11:09 PM

http://www.wikihow.com/Change-the-Timezone-in-Linux

Then, you can keep time current with ntp with a command like:

Code:

ntpdate pool.ntp.org

tdnguyenitvn · 10-27-2009, 12:09 AM

Quote:

Originally Posted by foodown

http://www.wikihow.com/Change-the-Timezone-in-Linux

Then, you can keep time current with ntp with a command like:

Code:

ntpdate pool.ntp.org

I do that before, but it's still can not.

How can i do with crontab to schedule synchronize about 5 minutes?

thank you

foodown · 10-27-2009, 12:27 AM

As root, do a 'crontab -e'

Then add this line:

Code:

*/5 * * * * /usr/sbin/ntpdate pool.ntp.org 1> /dev/null 2> /dev/null

Save and quit with a ':wq'

Did you follow the link that I posted?

tdnguyenitvn · 10-27-2009, 12:54 AM

Quote:

Originally Posted by foodown

As root, do a 'crontab -e'

Then add this line:

Code:

*/5 * * * * /usr/sbin/ntpdate pool.ntp.org 1> /dev/null 2> /dev/null

Save and quit with a ':wq'

Did you follow the link that I posted?

I follow already but it can not synchronize.

Thank you, i will add this schedule to the crontab.

foodown · 10-27-2009, 01:01 AM

What makes you say that it cannot synchronize . . . what are you seeing that indicates this to you?

tdnguyenitvn · 10-27-2009, 01:45 AM

Quote:

Originally Posted by foodown

What makes you say that it cannot synchronize . . . what are you seeing that indicates this to you?

The time on my server always run fast than real time.

When i use with your crontab but it still can not run correct.

foodown · 10-27-2009, 02:10 AM

So, first off, what timezone are you in?
Please post the output of:

Code:

ls -l /etc/localtime
ls -Rl /usr/share/zoneinfo
ntpdate pool.ntp.org
date
ntpdate pool.ntp.org
date

tdnguyenitvn · 10-27-2009, 02:34 AM

ls -l /etc/localtime

lrwxrwxrwx 1 root root 31 Oct 27 10:22 /etc/localtime -> /usr/share/zoneinfo/Asia/Saigon

ntpdate pool.ntp.org
27 Oct 13:33:03 ntpdate[2645]: step time server 221.132.37.28 offset -344.029524 sec

date
Tue Oct 27 13:33:55 ICT 2009

foodown · 10-27-2009, 03:05 AM

How long does it take to get fast?

I mean, if you run two ntpdate calls back to back, is there a significant offset on the second run?

tdnguyenitvn · 10-27-2009, 03:37 AM

Quote:

Originally Posted by foodown

How long does it take to get fast?

I mean, if you run two ntpdate calls back to back, is there a significant offset on the second run?

about 2 seconds. after 5 minutes it will run fast than with real time about 1 minute.