aix下开启ntp服务

1、配置/etc/ntp.conf文件，添加NTP服务器地址信息（server 192.168.1.20）
broadcastclient
driftfile /etc/ntp.drift
tracefile /etc/ntp.trace
server 192.168.1.20

2、启动xntpd进程

方法1：
# startsrc -s xntpd
0513-059 The xntpd Subsystem has been started. Subsystem PID is 327788.
方法2：
# smit xntpd
选择“Start Using the xntpd Subsystem”--“BOTH”

3、检查xntpd服务状态

# lssrc -ls xntpd

 Program name:    /usr/sbin/xntpd
 Version:         3
 Leap indicator:  11 (Leap indicator is insane.)
 Sys peer:        no peer, system is insane
 Sys stratum:     16
 Sys precision:   -18
 Debug/Tracing:   DISABLED
 Root distance:   0.000000
 Root dispersion: 0.000000
 Reference ID:    no refid, system is insane
 Reference time:  no reftime, system is insane
 Broadcast delay: 0.003906 (sec)
 Auth delay:      0.000122 (sec)
 System flags:    bclient pll monitor filegen 
 System uptime:   80 (sec)
 Clock stability: 0.000000 (sec)
 Clock frequency: 0.000000 (sec)
 Peer: 192.168.1.20
      flags: (configured)
      stratum:  3, version: 3
      our mode: client, his mode: server
Subsystem         Group            PID          Status
 xntpd            tcpip            172176       active

4、使用ntpdate手动与NTP服务器同步

# ntpdate -d 192.168.1.20

17 Nov 10:37:59 ntpdate[131094]: 3.4y
transmit(192.168.1.20)
receive(192.168.1.20)
transmit(192.168.1.20)
receive(192.168.1.20)
transmit(192.168.1.20)
receive(192.168.1.20)
transmit(192.168.1.20)
receive(192.168.1.20)
transmit(192.168.1.20)
server 192.168.1.20, port 123
stratum 3, precision -6, leap 00, trust 000
refid [64.4.10.33], delay 0.04146, dispersion 0.00026
transmitted 4, in filter 4
reference time:      d813d221.52a70817  Sun, Nov 16 2014 19:47:13.322
originate timestamp: d813ec37.25da3b4a  Sun, Nov 16 2014 21:38:31.147
transmit timestamp:  d814a2e7.2a0bd000  Mon, Nov 17 2014 10:37:59.164
filter delay:  0.04167  0.04150  0.04146  0.04146
               0.00000  0.00000  0.00000  0.00000
filter offset: -46768.0 -46768.0 -46768.0 -46768.0
               0.000000 0.000000 0.000000 0.000000
delay 0.04146, dispersion 0.00026
offset -46768.016225

17 Nov 10:37:59 ntpdate[131094]: step time server 192.168.1.20 offset -46768.016225