linux与windows双系统保持时间同步

linux和windows需要同时启用UTC，或者linux单独禁用UTC

修改Linux时区为UTC

sudo mv /etc/localtime  /etc/localtime.bak
sudo ln -s /usr/share/zoneinfo/UTC /etc/localtime

使用 ntpdate 更新系统时间

# ubuntu 
sudo apt install ntpdate ntp -y
sudo timedatectl set-timezone UTC
sudo ntpdate -u time.windows.com
sudo hwclock --systohc # 写入硬件
# 启动ntpd服务
sudo systemctl enable ntp # ubuntu
sudo systemctl start ntp
 
# centos
sudo yum install ntpdate ntp -y # centos
sudo timedatectl set-timezone UTC
sudo ntpdate -u time.windows.com
sudo hwclock --systohc # 写入硬件
# 启动ntpd服务
sudo systemctl enable ntpd # centos
sudo systemctl start ntpd

Linux禁用UTC

sudo timedatectl set-local-rtc 1
sudo hwclock --localtime --systohc

windows启用UTC

reg add HKLM\SYSTEM\CurrentControlSet\Control\TimeZoneInformation /v RealTimeIsUniversal /t REG_DWORD /d 1