Display free folder space - powershell

Question

I am creating a menu and have a option that displays the computer name and os version and a option that displays the disk space. I need to have the options to be done on a local or a remote machine. It works on the local machine but I am not sure how to allow the options to be done on a remote machine
'1' {
cls
Write-Host -NoNewLine "OS Version: "
Get-CimInstance Win32_OperatingSystem | Select-Object Caption | ForEach{ $_.Caption }
Write-Host ""
Write-Host -NoNewLine "Computer Name: "
Get-CimInstance Win32_OperatingSystem | Select-Object CSName | ForEach{ $_.CSName }
Write-Host ""
} '2' {
cls
gwmi win32_logicaldisk | Format-Table DeviceId, MediaType, #{n="Size";e={[math]::Round($_.Size/1GB,2)}},#{n="FreeSpace";e={[math]::Round($_.FreeSpace/1GB,2)}}

Answer 1

Since you have already mentioned that it is working in your local, I am not touching that part. Just wrap that entire code as a Function with $ComputerName as Parameters.
If you are in a domain admin or if you do not have any permission issue, then with the same credentials you can fetch the information remotely.
Use like this:
function Get-DiskInfo($drive,$computername)
{
##-- Local system Validation
if((gwmi win32_computersystem).Name -eq $computername)
{
$diskReport = Get-WmiObject Win32_logicaldisk
$drive = $diskReport | Where-Object { $_.DeviceID -eq $drive}
$result = #{
Size = $drive.Size
FreeSpace = $drive.Freespace
}
return $result
}
else
{
$diskReport = Get-WmiObject Win32_logicaldisk -ComputerName $ComputerName
$drive = $diskReport | Where-Object { $_.DeviceID -eq $drive}
$result = #{
Size = $drive.Size
FreeSpace = $drive.Freespace
}
return $result
}
}
Call the function:
Get-DiskInfo C: localhost
Since you are using all WMI calls , you do not need to use Invoke-Command.
You can directly use the -ComputerName switch present in the get-wmiobject to fetch all the details remotely and you can pass the specific credentials also as -credential
Hope it helps you understand the logic.