Powershell Script to probe for service on Remote Windows Hosts

I am not a Powershell master, I am making myself a favor by calling myself a beginner.

Requirement arose such that I had to write one to query a service on 400 hosts and I found it very much necessary to script it.

Of course , Powershell is much more organized then the batch scripting(though I haven't done much there either)

Below script will Read from the a text file "serverlist.txt" , the list of windows 2008 servers.

$serverlist=Get-Content("serverlist.txt")

$ping = new-object System.Net.NetworkInformation.Ping

foreach ($server in $serverlist)

{

if ($ping.Send($server).status -eq "Success")

{

Start-Sleep -Seconds 10

try 

{

$ErrorActionPreference = "silentlycontinue"

$status=Get-WmiObject -Class win32_service -ComputerName $server | ?{$_.name-like "tmlisten" } | % {"$($_.name) is $($_.state)"}

if($?)

{

if ( $status -eq "tmlisten is Running")

{

  echo "$server,$status"

  }

  elseif ($status -eq "tmlisten is Stopped")

  {

   (Get-WmiObject -computer $server Win32_Service -Filter "Name='tmlisten'").InvokeMethod("StartService")

   Start-Sleep -Seconds 30

   Get-WmiObject -Class win32_service -ComputerName $server | ?{$_.name-like "tmlisten" } | % {"$server,$($_.name) is $($_.state)"}

   }

} else

{

echo "$server,RPC service Connectivity issues."

}

   }catch

  {

  echo " $server,Exception occured while quering server."

  }

  }

else

{

echo "$server,Cant ping the server"

}

}

I am querying for a service "tmlisten".

Replace the service name with any other service, It should give the Results

This wonderful one liner put me in the right direction

http://www.pixelchef.net/powershell-script-find-status-service-remote-computer

Thanks a a million to the author as I was desperately looking for a solution.