cd /d %windir%\system32\drivers\etc
rem 先删除hosts.bak防止重命名失败
del hosts.bak
ren hosts hosts.bak
for /f "eol=# tokens=1,2" %%i in (hosts.bak) do call :checkvalue %%i %%j
goto end
:checkvalue
echo %2 | find /i "local"
if %errorlevel%==1 (echo %1 %2 >>hosts)
:end