如何告诉 Ubuntu 硬件时钟是当地时间？

systemd在使用命令将时间更改为本地并立即更新时钟的Ubuntu 版本中

timedatectl set-local-rtc 1 --adjust-system-clock

如果你运行timedatectl，它会显示一个警告

               Local time: ...
           Universal time: ... 
                 RTC time: ...     
                Time zone: ...
System clock synchronized: yes                         
              NTP service: active                      
          RTC in local TZ: yes  

Warning: The system is configured to read the RTC time in the local time zone.
         This mode can not be fully supported. It will create various problems
         with time zone changes and daylight saving time adjustments. The RTC
         time is never updated, it relies on external facilities to maintain it.
         If at all possible, use RTC in UTC by calling
         'timedatectl set-local-rtc 0'.

这个警告并不意味着它被设置为 0。如果它被设置为 0，timedatectl status 会说：

RTC in local TZ: no

并且没有警告。

RTC in local TZ: yes

是首选，如果你是双启动。建议的命令用于将 RTC 切换回“否”。