SelfNote: PowerShell scripts

the following three functions are use PowerShell to set password, move cluster, and test connection to a database server.

 #set account username and password  
 function Set-Password($computerName, $serviceName, $serviceAccount, $password)  
 {    
   invoke-command -computerName $computerName -ScriptBlock `  
   { param($computerName, $serviceName, $serviceAccount, $password); `  
     write-host "on computer " $env:ComputerName "working on " $serviceName; `  
     $filter = "Name='" + $serviceName + "' "; `  
     $sqlservice=Get-WMIObject win32_service -filter $filter;`  
     $result = $sqlservice.change($null,$null,$null,$null,$null,$null, $serviceaccount,$password,$null,$null,$null);`  
     if ($result.ReturnValue -eq 0) { write-host $computerName " done!"; } else { write-host $computerName " failed!"; } `  
   } `  
   -ArgumentList $computerName,$serviceName,$serviceAccount,$password `  
 }  
 # move cluster  
 function Move-Cluster($computerName)  
 {  
   invoke-command -computerName $computerName -ScriptBlock `  
   { `  
     import-module failoverclusters;`  
     $result = Move-ClusterGroup sqlgroup;`  
     write-host "owner node = " $result.OwnerNode; `  
     $result = Move-ClusterGroup sqlgroup;`  
     write-host "owner node = " $result.OwnerNode; `  
   }  
 }  
 #test connection  
 function Test-Connection($servername)  
 {  
   $SqlConnection = New-Object System.Data.SqlClient.SqlConnection;  
   $SqlConnection.ConnectionString = "Server=$servername;Database=master;Integrated Security=True";  
   try  
   {  
     $SqlConnection.Open();  
     write-host "$servername connection OK."      
   }  
   catch  
   {  
     write-host "$servername connection failed"  
     write-host $error[0]  
   }  
   finally  
   {  
     $SqlConnection.Close();  
   }  
 }