linux同步时间
1. 安装ntp# yum install ntpwget http://mirrors.163.com/centos/5/os/i386/CentOS/ntp-4.2.2p1-15.el5.centos.i386.rpmrpm -ivh ntp-4.2.2p1-15.el5.centos.i386.rpm
2. 立即更新时间
sudo /sbin/ntpdate time.nist.gov
3. 每天定时更新时间
sudo vi /etc/crontab00 0 1 * * root /sbin/ntpdate time.nist.gov
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