分类:CentOS教程 阅读:97659 次



其中rdate本身是用来获取远程时间服务器上时间用的,带上 -s 参数,就可以将获取到的时间应用到本地系统。

NAME rdate - get the time via the network SYNOPSIS rdate [-p] [-s] [-u] [-l] [-t sec] [host...] DESCRIPTION rdate connects to an RFC 868 time server over a TCP/IP network, printing the returned time and/or setting the system clock. OPTIONS -p Print the time returned by the remote machine. -s Set the system time to the returned time. -u Use UDP instead of TCP as the transport. -l Use syslog to output errors (cron.warning) and output (cron.info). -t Set timeout in seconds for every attempt to retreive date.

rdate -s time.nist.gov


示例 :ntpdate ntp.sjtu.edu.cn

NAME ntpdate - set the date and time via NTP Disclaimer: The functionality of this program is now available in the ntpd program. See the -q com- mand line option in the ntpd - Network Time Protocol (NTP) daemon page. After a suitable period of mourning, the ntpdate program is to be retired from this distribution SYNOPSIS ntpdate [ -46bBdqsuv ] [ -a key ] [ -e authdelay ] [ -k keyfile ] [ -o version ] [ -p samples ] [ -t timeout ] [ -U user_name ] server [ ... ] DESCRIPTION [略,具体参看linux man手册]



参看 国内常用NTP服务器地址及IP http://www.douban.com/note/171309770/

其中国家授时中心的似乎不能用,推荐使用上海交大ntp服务 ntp.sjtu.edu.cn 或美国授时中心 time.nist.gov


rdate -s time.nist.gov

ntpdate ntp.sjtu.edu.cn