Scientific Linux 6
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NTP Server2011/03/13

  Configure NTP server for time adjustment.
[root@dlp ~]#
yum -y install ntp


[root@dlp ~]#
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

server ntp2.jst.mfeed.ad.jp

server ntp3.jst.mfeed.ad.jp


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

Starting ntpd:
[ OK ]

[root@dlp ~]#
chkconfig ntpd on

[root@dlp ~]#
ntpq -p

remote
refid
st
t
when
poll
reach
delay
offset
jitter

==========================================================
ntp1.jst.mfeed.
210.173.176.4
2
u
2
64
1
21.227
187904.
0.000

ntp2.jst.mfeed.
210.173.176.4
2
u
1
64
1
21.400
187903.
0.000

ntp3.jst.mfeed.
210.173.176.4
2
u
-
64
1
22.087
187900.
0.000
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