timedatectl

範例

$ timedatectl
                        Local time: Sat 2018-05-19 00:54:56 CST
                  Universal time: Fri 2018-05-18 16:54:56 UTC
                        RTC time: Fri 2018-05-18 16:54:56
                       Time zone: Asia/Taipei (CST, +0800)
       System clock synchronized: yes
systemd-timesyncd.service active: yes
                 RTC in local TZ: no