Home / server / Questions / 540303
In Process
ujjain
Asked: 2013-09-20 12:20:40 +0800 CST

How to make NTP work despite a high offset?

  • 772

Recently I have kickstarted some servers that had their time off by a month in the bios. The time in the bios said it was a random time/date in May, while it was June.

This caused NTP not to work, because NTP doesn't sync with such a high offset. How can I make sure that NTP syncs despite the offset, in this case a month, being too high?

redhat

3 Answers

  1. See -g option for ntpd; set in /etc/sysconfig/ntpd. (IMO, running both ntpd and ntpdate is distasteful.)

    • 5

  2. For EL5 and EL6:

    Start ntpdate as well.

    It should be sufficient to enable them in your kickstart.

    %post
chkconfig ntpdate on
chkconfig ntpd on
    • 1

  3. Running the following from the command line should force an update despite any time difference.

    ntpd -gq
    • 1