1. timedatectl list-timezone|grep Taipei
2. timedatectl set-timezone Asia/Taipei
或
date -s "20211031 1500″
hwclock-s
或
ntpdate watch.watch.stdtime.gov.tw; hwclock -w; hwclock
https://blog.gtwang.org/linux/centos-linux-change-system-timezone-command-tutorial/