Server dropped: no data (ntpdate 同步时间服务器)
记录一下/usr/sbin/ntpdate -d time.windows.com
29 Dec 22:15:42 ntpdate: ntpdate 4.2.6p5@1.2349-o Tue May 31 10:09:22 UTC 2016 (1)
Looking for host time.windows.com and service ntp
host found : 52.169.179.91
transmit(52.169.179.91)
transmit(52.169.179.91)
transmit(52.169.179.91)
transmit(52.169.179.91)
transmit(52.169.179.91)
52.169.179.91: Server dropped: no data
server 52.169.179.91, port 123
stratum 0, precision 0, leap 00, trust 000
refid , delay 0.00000, dispersion 64.00000
transmitted 4, in filter 4
reference time: 00000000.00000000Mon, Jan1 19008:05:43.000
originate timestamp: 00000000.00000000Mon, Jan1 19008:05:43.000
transmit timestamp:dc0f9911.af8c98c3Thu, Dec 29 2016 22:15:45.685
filter delay:0.000000.000000.000000.00000
0.000000.000000.000000.00000
filter offset: 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000
delay 0.00000, dispersion 64.00000
offset 0.000000
29 Dec 22:15:46 ntpdate: no server suitable for synchronization found
解决方法：
yum install ntp
/etc/init.d/ntpd start
# /usr/sbin/ntpdate time.windows.com
29 Dec 22:24:39 ntpdate: the NTP socket is in use, exiting
/etc/init.d/ntpd stop
/usr/sbin/ntpdate cn.pool.ntp.org
29 Dec 14:26:50 ntpdate: step time server 42.96.167.209 offset -28703.604438 sec
成功解决，具体原因还有待查。
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