linux配置NTP简明教程

[root@hxl ntp]# uname -a
Linux hxl 2.6.18-8.el5xen #1 SMP Fri Jan 26 14:42:21 EST 2007 i686 i686 i386 GNU/Linux

[root@hxl ntp]# rpm -qa|grep ntp
ntp-4.2.2p1-5.el5

#加入中国或亚洲的时间服务器
server 0.cn.pool.ntp.org
server 1.asia.pool.ntp.org
server 2.asia.pool.ntp.org
#注释掉安装时默认的时间服务器
#server 0.rhel.pool.ntp.org
#server 1.rhel.pool.ntp.org
#server 2.rhel.pool.ntp.org
#加入
restrict 0.cn.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
restrict 1.asia.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
restrict 2.asia.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
#注释掉(我的环境下找不到如下三行,直接加入如上三行就行)
#restrict 0.rhel.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
#restrict 1.rhel.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
#restrict 2.rhel.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery

[root@hxl ntp]# service ntpd restart
Shutting down ntpd:   [  OK  ]
ntpd: Synchronizing with time server:   [  OK  ]
Starting ntpd:      [  OK  ]