Fedora 15
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NTP Server
2011/05/25
  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.fedora.pool.ntp.org iburst
#
server 1.fedora.pool.ntp.org iburst
#
server 2.fedora.pool.ntp.org iburst
#
server 3.fedora.pool.ntp.org iburst
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 (via systemctl):
[ OK ]

[root@dlp ~]#
systemctl enable ntpd.service

ln -s '/lib/systemd/system/ntpd.service' '/etc/systemd/system/multi-user.target.wants/ntpd.service'
[root@dlp ~]#
ntpq -p

remote           refid         st t when poll reach   delay   offset  jitter
==============================================================================
 ntp1.jst.mfeed.	210.173.160.86	2 u	   3	64    1   18.229  -2361.1   0.000
 ntp2.jst.mfeed.	210.173.176.4	2 u	   2	64    1   18.268  -2362.1   0.000
 ntp3.jst.mfeed.	210.173.160.86	2 u	   1	64    1   15.988  -2362.2   0.000
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