检查dns是否可用

$dnss=gwmi win32_networkadapter -filter "NetConnectionStatus = 2"|foreach {(gwmi Win32_NetworkAdapterConfiguration -filter "index = $($_.index)").DNSServerSearchOrder}

foreach ($dns in $dnss)
{
$dns
$ns = cmd /c "nslookup www.baidu.com $dns"
if ($ns.contains("DNS request timed out."))
{"error"}

}

检查dns是否可用

原文：http://www.cnblogs.com/dreamer-fish/p/4032110.html