reg export "HKLM\SYSTEM\CurrentControlSet\Services\DNS" F:\backup\DNS1%date:~0,4%%date:~5,2%%date:~8,2%.reg
reg export "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\DNS F:\backup\DNS2%date:~0,4%%date:~5,2%%date:~8,2%.reg
原文：https://www.cnblogs.com/sfqas/p/12181891.html