Author Posts

June 1, 2016 at 3:46 pm

I've got a script that tests to see which computers from AD are online at this time:

param (
$pattern
)
$computers = Get-ADComputer -filter {name -like $pattern} | Select-Object -ExpandProperty Name
$available = ForEach($computer in $computers)
{
$ping = Test-Connection -ComputerName $computer -Count 1 -Quiet
[PSCustomObject]@{
Hostname = $computer
Available = $ping }
}
$available | Sort-Object Available | Format-Table -AutoSize

It returns the hostname and true if on line and false if not. I want to filter out the hosts that are returned false (not online).

June 1, 2016 at 4:03 pm

Why not just export the results to a CSV file?

June 1, 2016 at 4:26 pm

That's what filter blocks are for:

$Available | Where {$_.Available} | Format-Table -Auto

June 1, 2016 at 4:37 pm

Because I plan on passing the output to other scripts that will be executed on computers that are currently on line.

June 1, 2016 at 6:57 pm

Got it figured out:

param (
$pattern
)

$computers = Get-ADComputer -filter {name -like $pattern} |
Select-Object -ExpandProperty Name

ForEach($computer in $computers)
{
[bool]$ping = Test-Connection -ComputerName $computer -Count 1 -Quiet
if ($ping)
{
$computer
}
}

The parameter takes a name pattern you want to run the script on. For example I have a group of computers whose names are UKOFCLT01, UKOFCLT02, UKOFCLT03 etc... so I'd enter UKOFCLT* to test all names in that office for connectivity.

June 2, 2016 at 11:25 am

In this line, "[bool]$ping = Test-Connection -ComputerName $computer -Count 1 -Quiet", you do not need the [bool] type as -quiet on test-connection will give a true or false result.

I.e.
PS C:\WINDOWS\system32> test-connection localhost -Quiet
True

I've re-written your code a little:

$Computers = Get-Content 'C:\temp\Computers.txt'

$Computers | 
    foreach { if (Test-Connection -ComputerName $_ -count 1 -Quiet) { 
        "$_ is Online"
    }else{
        "$_ is offline"} 
         }
Output:
localhost is Online
testbox is offline
        

I've used get content as a test, but you can add your get-adcomputer line here. Also, where I have 'online' and 'offline', add what output you require. Hope that helps Chris.