Author Posts

September 8, 2013 at 4:58 am

Hi,

Sorry, total nooby question here. I've just started trying to learn powershell, and have a simple script that I use to find Mac addresses.

$Name = Read-Host "Enter Machine Name"
Get-WmiObject win32_networkadapter -ComputerName $Name |
where {$_.physicaladapter -eq $true} |
Select-Object macaddress,netconnectionid
PAUSE

I'd like for this script, once finshed, to prompt the user to continue, and then go back to the start. Could someone point me in the right direction?

Many thanks

September 8, 2013 at 5:18 am

First question has to be what are you trying to achieve?

if this meant to be an interactive tool or are you trying to get the MAC address of a number of machines

I'm going to assume the latter in which case you want something like this:

param ([string]$name)
Get-WmiObject -Class Win32_NetworkAdapter -Filter "PhysicalAdapter = $true" -ComputerName $Name |
Select-Object macaddress,netconnectionid

The param block accepts the name of the computer. I moved the filter into the Get-WmiObject -Filter because then the filter happens on the remote machine not your local machine
Save the script as get-macaddress
You can use it like this
.\get-macaddress.ps1 -name server02
.\get-macaddress.ps1 -name server03
.\get-macaddress.ps1 -name exch10

Better still make the script a function that accepts pipeline input

function get-macaddress {
[CmdletBinding()]
param (
[parameter(ValueFromPipeline=$true)]
[string]$Computername
)
PROCESS {
Get-WmiObject -Class Win32_NetworkAdapter -Filter "PhysicalAdapter = $true" -ComputerName $Computername |
Select-Object PSComputerName, macaddress,netconnectionid
}
}

Load the function like this:
. .\get-macaddress.ps1

You can then use it like this:
get-macaddress -Computername server02
get-macaddress -Computername server03
get-macaddress -Computername exch10
"server02", "server03", "exch10" | get-macaddress

I would strongly urge you to buy and read Powershell in a Month of Lunches (www.manning.com/jones3) which is the best introduction to PowerShell

September 8, 2013 at 5:30 am

This is fantastic, thank you.

I'm reading Windows Powershell 3.0 First Steps, at the moment, and will probably read your suggestion too.