1，設置A機時間服務器：
a,修改 /etc/ntp.conf，如下：
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
server 127.127.1.0 # local clock
#fudge 127.127.1.0 stratum 10
b,
/etc/init.d/ntpd start #啟動時間服務器
service ntpd status
service ntpd start
c,
[root@cardapp1 etc]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*LOCAL(0) .LOCL. 5 l 59 64 377 0.000 0.000 0.000
d,chkconfig ntpd on #設置自啟動
2，設置需同步的客戶端機：
a,
修改 /etc/ntp.conf，如下：
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
server 200.4.0.40 # local clock 時間同步服務器A機
fudge 200.4.0.40 stratum 10
b,
service ntpd status
service ntpd start
c,(只有開了/etc/init.d/ntpd start，才能看到下面信息)
[root@webcard2 etc]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
200.4.0.40 LOCAL(0) 6 u 5 64 1 1.377 -7077.8 0.000
d,chkconfig ntpd on #設置自啟動
e, ntpdate -d 200.4.0.40