Archive for the tag 'ntpdate'

SBDavid
Nov 13th, 2011

Using ntpdate command

Using ntpdate command

The ntpdate command will sync your clock with an NTP server

The ntpdate command will not run when the NTP server is running, if you run then it says the NTP socket is in use, exiting.

[centos@centos ~]$ grep ^server /etc/ntp.conf
server 0.rhel.pool.ntp.org
server 1.rhel.pool.ntp.org
server 2.rhel.pool.ntp.org
[centos@centos ~]$ sudo ntpdate 0.rhel.pool.ntp.org
[sudo] password for centos:
13 Nov 19:15:42 ntpdate[10611]: the NTP socket is in use, exiting
[centos@centos ~]$

Stop NTP and then run ntpdate

centos@centos ~]$ sudo /etc/init.d/ntpd stop
Shutting down ntpd: [ OK ]
[centos@centos ~]$ sudo ntpdate 0.rhel.pool.ntp.org
13 Nov 19:16:58 ntpdate[10636]: adjust time server 123.108.200.163 offset -0.285447 sec
[centos@centos ~]$ sudo /etc/init.d/ntpd start
Starting ntpd: [ OK ]
[centos@centos ~]$ pgrep ntp
10643
[centos@centos ~]$

Reference: http://support.ntp.org/bin/view/Support/GettingStarted