Find computers without specific app

Welcome Forums General PowerShell Q&A Find computers without specific app

This topic contains 2 replies, has 3 voices, and was last updated by

1 year, 1 month ago.

  • Author
  • #91409

    Points: 1
    Rank: Member


    I have this :

    $servers =Get-Content -Path "C:\servers.txt"
    Invoke-command -ea SilentlyContinue -computer $servers -ScriptBlock {Get-WmiObject -class win32_product | where {$_.Name -eq "app1"} | select Name}

    the output is :
    Name PSComputerName RunspaceId
    App1 xxx ddd

    I want to find all the computers that doesn't contain "app1" .
    the output should contains also Name PSComputerName RunspaceId

    I tried ForEach with If but I didn't get the computers names


  • #91438

    Points: 1,811
    Helping HandTeam Member
    Rank: Community Hero

    Simply saying you "tried ForEach" isn't really helpful; you'll want to show your code so that we can help you spot the problem.

    In your case, you won't get any results from computers that don't have the app installed. So if you compare the computer names you started with to the ones that give you results, the "missing" ones are the ones that don't have the app.

    $servers =Get-Content -Path "C:\servers.txt"
    $hasapp = Invoke-command -ea SilentlyContinue -computer $servers -ScriptBlock {Get-WmiObject -class win32_product | where {$_.Name -eq "app1"} } | Select -Expand PSComputerName
    Compare-Object $servers $hasapp |
    Where SideIndicator -eq "< ="

    You will have to experiment with that. It might need => instead, for example. This will also run a little faster if you use -Filter on Get-WmiObject instead of getting everything and then running Where-Object.

  • #91451

    Points: 167
    Helping Hand
    Rank: Participant

    I would account for the 3 scenarios, server unreachable, app present, app not present, and normalize the output like

    $ServerList = Get-Content -Path 'C:\servers.txt'
    $AppName = 'App1'
    $AppReport = $ServerList | foreach {
        try {
            $Result = Invoke-command -ComputerName $PSItem -ErrorAction Stop -ScriptBlock {
                Get-WmiObject -Class win32_product | where { $PSItem.Name -eq $Using:AppName } | select Name
            if ($Result) {
                $ServerStatus = 'Online'
                $AppStatus = $Result.Name
            } else {
                $ServerStatus = 'Online'
                $AppStatus = 'Not Present'
        } catch {
            $ServerStatus = 'Unreachable'
            $AppStatus = 'Presense Unknown'
            ComputerName = $PSItem
            Status       = $ServerStatus
            $AppName     = $AppStatus
    $AppReport | Format-Table -AutoSize 

The topic ‘Find computers without specific app’ is closed to new replies.

denizli escort samsun escort muğla escort ataşehir escort kuşadası escort