Windows10とマルチブートさせたら9時間のずれ
例のやつですよ。
$ sudo timedatectl set-local-rtc true
これで無事に解決
$ sudo timedatectl status Local time: 木 2019-12-26 15:34:14 JST Universal time: 木 2019-12-26 06:34:14 UTC RTC time: 木 2019-12-26 15:34:14 Time zone: Asia/Tokyo (JST, +0900) System clock synchronized: no systemd-timesyncd.service active: yes 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'.