1. 查看时间

root [~] date
Wed May 25 15:06:55 CST 2016

2. 设置时区

root [~] cat /etc/sysconfig/clock
ZONE="Asia/Shanghai"

3. 时间校对

root [~] ntpdate time.windows.com

4. 自动时间校对

root [~] crontab -e
00 0 1 * * root ntpdate -s time.windows.com