configure NTP server for time adjustment centos 6

IN this tutorial we will study about how to configure NTP server for time adjustment. NTP uses 123/UDP.

[root@easylinux ~]# yum -y install ntp

[root@easylinux ~]# vi /etc/ntp.conf

# line 19: add the network range you allow to receive requests

restrict 10.0.0.0 mask 255.255.255.0 nomodify notrap

# change servers for synchronization

#

server 0.rhel.pool.ntp.org

#

server 1.rhel.pool.ntp.org

#

server 2.rhel.pool.ntp.org

server ntp1.jst.mfeed.ad.jp iburst

server ntp2.jst.mfeed.ad.jp iburst

server ntp3.jst.mfeed.ad.jp iburst

[root@easylinux ~]# /etc/rc.d/init.d/ntpd start

Starting ntpd:[ OK ]

[root@easylinux ~]# chkconfig ntpd on

[root@easylinux ~]# ntpq -p

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 ntp1.jst.mfeed. 210.173.160.56   2 u    8   64    1   24.214  1449.94   0.000
 ntp2.jst.mfeed. 210.173.160.56   2 u    7   64    1   31.454  1445.03   0.000
 ntp3.jst.mfeed. 210.173.160.86   2 u    6   64    1   26.589  1448.61   0.000



reference server-world.info