ntp搭建

服务端
yum -y install ntp
vim /etc/ntp.conf

driftfile /var/lib/ntp/drift
restrict 192.168.0.0 mask 255.255.255.0 nomodify
restrict 192.168.1.0 mask 255.255.255.0 nomodify
restrict 192.168.2.0 mask 255.255.255.0 nomodify
server ntp.api.bz
server time.windows.com

iptables -A INPUT -p udp -m udp -dport 123 -j ACCEPT

客户端：

crontab -e

*/5 * * * * ntpdate 192.168.1.3