PS >$command = { Get-Process | Where-Object { $_.Handles -gt 1000 } }

PS >Invoke-RemoteExpression \\LEE-DESK $command | Sort Handles

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName

-------  ------    -----      ----- -----   ------     -- -----------

   1025       8     3780       3772    32   134.42    848 csrss

   1306      37    50364      64160   322   409.23   4012 OUTLOOK

   1813      39    54764      36360   321   340.45   1452 iTunes

   2316     273    29168      41164   218   134.09   1244 svchost

Example 21-3. Invoking a PowerShell expression on a remote machine

PS >$command = { Get-Process | Where-Object { $_.Handles -gt 1000 } }

PS >Invoke-RemoteExpression \\LEE-DESK $command | Sort Handles

Handles  NPM(K)    PM(K)      WS(K) VM(M)   CPU(s)     Id ProcessName

-------  ------    -----      ----- -----   ------     -- -----------

   1025       8     3780       3772    32   134.42    848 csrss

   1306      37    50364      64160   322   409.23   4012 OUTLOOK

   1813      39    54764      36360   321   340.45   1452 iTunes

   2316     273    29168      41164   218   134.09   1244 svchost

Example 21-4. Invoke-RemoteExpression.ps1

##############################################################################

##

## Invoke-RemoteExpression.ps1

##

## Invoke a PowerShell expression on a remote machine. Requires PsExec from

## http://www.microsoft.com/technet/sysinternals/utilities/psexec.mspx

##

## ie:

##

##  PS >Invoke-RemoteExpression \\LEE-DESK { Get-Process }

##  PS >(Invoke-RemoteExpression \\LEE-DESK { Get-Date }).AddDays(1)

##  PS >Invoke-RemoteExpression \\LEE-DESK { Get-Process } | Sort Handles

##

##############################################################################

param(

  $computer = "\\$ENV:ComputerName",

  [ScriptBlock] $expression = $(throw "Please specify an expression to invoke."),

  [switch] $noProfile

  )

## Prepare the command line for PsExec. We use the XML output encoding so

## that PowerShell can convert the output back into structured objects.

$commandLine = "echo . | powershell -Output XML "

if($noProfile)

{

    $commandLine += "-NoProfile "

}

## Convert the command into an encoded command for PowerShell

$commandBytes = [System.Text.Encoding]::Unicode.GetBytes($expression)

$encodedCommand = [Convert]::ToBase64String($commandBytes)

$commandLine += "-EncodedCommand $encodedCommand"

## Collect the output and error output

$errorOutput = [IO.Path]::GetTempFileName()

$output = psexec /acceptEula $computer cmd /c $commandLine 2>$errorOutput

## Check for any errors

$errorContent = Get-Content $errorOutput

Remove-Item $errorOutput

if($errorContent -match "Access is denied")

{

    $OFS = "`n"

    $errorMessage = "Could not execute remote expression. "

    $errorMessage += "Ensure that your account has administrative " +

        "privileges on the target machine.`n"

    $errorMessage += ($errorContent -match "psexec.exe :")

    Write-Error $errorMessage

}

## Return the output to the user

$output