Topics: Red Hat / Linux, System Admin

How to enable ntpd on Linux

This is a procedure to enable time synchronization (ntpd) on Linux (in this example, replace the IP address of the time server with the IP address of your time server):

  • Stop all applications on the server.
  • Check if you can access the time servers, e.g.:
    # ntpdate -q
  • Check if the current timezone setting is correct by simply running the date command.
  • Set the time and date correct:
    # ntpdate
  • Start the NTP server:
    # service ntpd start
  • Check the status:
    # service ntpd status
  • Check the time synchronization (it may take some time for the client to synchronize with its time server):
    # ntpq -p
  • Check that ntpd is started at system restart:
    # chkconfig ntpd on
    # chkconfig --list | grep ntpd
  • Check the process:
    # ps -ef | grep ntpd
  • Reboot the server:
    # reboot

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