查看状态：timedatectl
Local time: 三 2016-07-13 23:40:35 CST
Universal time: 三 2016-07-13 15:40:35 UTC
RTC time: 三 2016-07-13 15:40:35
Time zone: Asia/Shanghai (CST, +0800)
Network time on: yes
NTP synchronized: yes
RTC in local TZ: no
timedatectl set-local-rtc 1