目录
- 16.1. ntpd - Network Time Protocol (NTP) daemon
- 16.2. ntp client
http://www.ntp.org
16.1. ntpd - Network Time Protocol (NTP) daemon
过程 16.1. ntp server
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# yum install ntp
-
port
[root@ntp ~]# netstat -unlnp |grep 123 udp 0 0 192.168.5.5:123 0.0.0.0:* 10810/ntpd udp 0 0 172.16.0.5:123 0.0.0.0:* 10810/ntpd udp 0 0 192.168.3.5:123 0.0.0.0:* 10810/ntpd udp 0 0 127.0.0.1:123 0.0.0.0:* 10810/ntpd udp 0 0 0.0.0.0:123 0.0.0.0:* 10810/ntpd udp 0 0 ::1:123 :::* 10810/ntpd udp 0 0 fe80::225:64ff:fe9a:123 :::* 10810/ntpd udp 0 0 :::123 :::* 10810/ntpd [root@ntp ~]# lsof -i :123 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME ntpd 10810 ntp 16u IPv4 35921 UDP *:ntp ntpd 10810 ntp 17u IPv6 35922 UDP *:ntp ntpd 10810 ntp 18u IPv6 35923 UDP [fe80::225:64ff:fe9a:d7e0]:ntp ntpd 10810 ntp 19u IPv6 35924 UDP localhost6.localdomain6:ntp ntpd 10810 ntp 20u IPv4 35925 UDP localhost.localdomain:ntp ntpd 10810 ntp 21u IPv4 35926 UDP nis.example.com:ntp ntpd 10810 ntp 22u IPv4 35927 UDP 172.16.0.5:ntp ntpd 10810 ntp 23u IPv4 35928 UDP 192.168.5.5:ntp
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status
ntpstat
[root@subversion ~]# ntpstat synchronised to local net at stratum 11 time correct to within 11 ms polling server every 1024 s
[root@subversion ~]# ntptrace -n 127.0.0.1 127.0.0.1: stratum 11, offset 0.000000, synch distance 0.010984
[root@subversion ~]# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== 122.226.192.4 .INIT. 16 u - 1024 0 0.000 0.000 0.000 218.75.4.130 .INIT. 16 u - 1024 0 0.000 0.000 0.000 www.chinaepg.ne .INIT. 16 u - 1024 0 0.000 0.000 0.000 *LOCAL(0) .LOCL. 10 l 60 64 377 0.000 0.000 0.001 -
http://www.pool.ntp.org/
vim /etc/ntp.conf server 2.cn.pool.ntp.org server 3.asia.pool.ntp.org server 2.asia.pool.ntp.org
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# chkconfig ntpd on # service ntpd start/stop/restart
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原文出处：Netkiller 系列 手札
本文作者：陈景峯
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