40 comment

1. Nice inof, but how do i configure a NTP server? i want to do this with a client and a server… Thanks

2. Thanks, very straight forward.

3. This helped me to fix my call of duty world at war server problem.

   Thank you.

4. Does anyone know how to make it run ntpdate at certain time increments?
   Like every hour?
   Thanks

   1. Setup a cronjob.

5. Good info, very helpful.
   Thanks!

6. Thanks, very simple to install and configure. My time is synchronized now.

7. nice information but please tell me about the client end that how i sync time server with clients

   1. See: CentOS / Red Hat Configure an NTP Client And Server

8. thanks man

   very nice

   1. is there a way where i can use my own server from which clients should sync time?

9. I did ntpdate 0.asia.pool.ntp.org
   and now all my servers showing different time. Any idea why
   server1 – Wed Jan 6 15:54:10 IST 2010
   server2 – Wed Jan 6 15:47:39 IST 2010
   server3 – Wed Jan 6 15:58:23 IST 2010

   For more infomation – My servers are in India
   Thanks in advance

10. @Kunal,

    My guess: You are obtaining your time info from a pool, so each time you synchronize you’re really getting your time form a different server. This shouldn’t matter, but it seems that the different servers in that pool are not synchronized with each other. You could pick a single server out of the pool and synchronize with it directly on each of your servers.

    Or, even better, set up your own ntp server, have it synchronize with a quality outside time server, then have the rest of your servers sync up with the time server that you installed. That way, even if there’s an accuracy problem upstream, at least all of your servers will agree with each other.

11. I have this error:

    ntpdate[14060]: step-systime: Operation not permitted

    1. This is likely related to the server being a virtual server. It is not possible to sync to ntp in a VPS because the clock is inherited from the hardware that you are hosted on.

       I just ran across the same problem.

12. Very useful

13. Very Helpful :)

14. Replying @Anonymous June 4, 2010

    Actually if you mean a Xen VM, you still can have your own independent system clock setting the following sysctl parameter.
    sysctl -w xen.independent_wallclock = 1;

    And you save it inside /etc/sysctl.conf

    1. Thanks for this tip!

15. Thanks you for your instructions.

16. This is exactly what I was looking for. Thank you for this clear post. :)

17. Thank you this was very helpful!

18. i have configured ntp server on my machine which runs rhel6
    but at the client side at the time of ntp setting it giving me error tha
    server is note reachable or doesn’t act as a ntp server and also i cant
    see the port of ntp is open on my system, will you please help me for this

    Thanks

19. Thanks but setting up / configuriing ntp servers list would be useful also

20. Thank you very much, it was exactly as you said.

21. Thanks a lot. great howto…

22. i am from Malaysia. which server should i use ?

23. Great post ,, and it works as a charm :) ,, thank you very much

24. Thanks a lot for your concise post.

25. The following command will additionally update your hardware clock

    hwclock –systohc

26. Very helpful. Thanks

27. You dont need to have an ntp server running in your machine in order to have the time synced, it is as easy as having cron do the syncing with the ‘ntpclient’ command.

    1. Hi Fred,
       Could you please share script to sync with ntp server. so that i can run the same as a cron job.

28. Thank you much.

29. Thanks!!!

30. Thanks! you saved my day!

31. Thank you very much ! Very useful guide.

32. Hi,

    I’m having a small issue on Fedora 21: when my computer goes to sleep, I lose time synchronization and have to manually restart ntpd when I wake it in order to resync. Any idea how to fix this?

33. Great tutorial! Thanks so much from Brazil.
    Ed

34. Thanks! Very helpful.

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