[root@bogon ~]# rm /etc/localtime

[root@bogon ~]# ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

[root@bogon ~]# date

Thu Sep 14 08:54:32 CST 2017

[root@bogon ~]# yum install -y ntpdate

[root@bogon ~]# ntpdate time.nist.gov

14 Sep 15:59:43 ntpdate[1563]: step time server 129.6.15.30 offset 25042.106941 sec

[root@bogon ~]# date

Thu Sep 14 15:59:46 CST 2017