Upgraded output for powershell script - powershell

Question

I am trying to write script that will check servers hostnames.
Now I have:
Computers.txt
192.168.10.10
192.168.10.11
192.168.10.12
and script:
$servers = get-content "C:\Script\computers.txt"
Invoke-Command -Credential company\admin1 -ComputerName $computers -scriptblock {[Environment]::GetEnvironmentVariable("ComputerName")} | out-file C:\Script\report_hostnames.txt
And I have report:
Computer1
Computer2
Computer3
Could you help me add IP adress to report, and error status, like this:
192.168.10.10 Computer1
192.168.10.11 Computer1
192.168.10.12 Computer Unavailable
I tried: foreach; try, catch and if, else but cannot understand how to use it in right way.

Answer 1

Try this:
get-content "C:\Script\computers.txt" | foreach {
$Response = Invoke-Command -Credential company\admin1 -ComputerName $_ -scriptblock {[Environment]::GetEnvironmentVariable("ComputerName")}
write-output "$_ $Response" | out-file C:\Script\report_hostnames.txt
}
Using an array inside the -ComputerName attribute and then piping the output forward to out-file doesn't give you a way to access the contents of -ComputerName attribute (at least that I know of). Breaking it up into a basic foreach does.

Answer 2

You should be able to use DNS to look up the host names. Example:
Get-Content "IPAddresses.txt" | ForEach-Object {
$outputObject = [PSCustomObject] #{
"IPAddress" = $_
"HostName" = $null
}
try {
$outputObject.HostName = [Net.Dns]::GetHostEntry($_).HostName
}
catch [Management.Automation.MethodInvocationException] {
$outputObject.HostName = $_.Exception.InnerException.Message
}
$outputObject
}