Rename Vm Computer name using Bulk - powershell

Question

I have Text file with number of local VM names in Hyper-v :
newname
IL-SRV
IL-TST
IL-MGN
IL-BBT
This is the names in my hyper-V environment , And i would like to change their computer name by using Powershell and bulk
I'm using this script
$computers = import-csv -Path C:\Users\Itay\Desktop\Servers.txt
foreach ($newname in $computers){
Invoke-Command -VMName $computers.newname -Credential administrator -ScriptBlock {Rename-Computer -NewName $computers.newname -Restart -Force}
}
But i receive this error
"
Invoke-Command : The input VMName IL-SRV does not resolve to a single virtual machine.
At line:11 char:1
+ Invoke-Command -VMName $computers.newname -Credential administrator - ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [Invoke-Command], ArgumentException
+ FullyQualifiedErrorId : InvalidVMNameNotSingle,Microsoft.PowerShell.Commands.InvokeCommandCommad
"

Answer 1

Each iteration you are processing the entire list of $computers.newname
In your loop you create variable $newname without ever using it. You should be very careful when running commands that make changes especially if you aren't familiar with how powershell works. The other glaring issue is you are using Invoke-Command on a remote computer but using a local variable. I am taking a guess that you're trying to do is this.
$CSVData = import-csv -Path C:\Users\Itay\Desktop\Servers.txt
foreach ($line in $CSVData){
Invoke-Command -VMName $line.newname -Credential administrator -ScriptBlock {Rename-Computer -NewName $using:line.newname -Restart -whatif}
}
Note the $using:line variable. This provides the contents of the local variable to the remote computer. Another way to handle it would be use the -Argumentlist. I recommend using named parameters when doing so, like this.
$CSVData = import-csv -Path C:\Users\Itay\Desktop\Servers.txt
foreach ($line in $CSVData){
Invoke-Command -VMName $line.newname -Credential administrator -ScriptBlock {
Param($incomingname)
Rename-Computer -NewName $incomingname -Restart -whatif
} -ArgumentList $line.newname
}
The last thing you need to do AFTER confirming it's going to do what you desire is to remove the -WhatIf parameter from Rename-Computer. Rename-Computer has a -ComputerName parameter as well, fyi.
Either of these could also be written like this since there is only one property on $CSVData that we care about
$CSVData = import-csv -Path C:\Users\Itay\Desktop\Servers.txt
foreach ($name in $CSVData.newname){
Invoke-Command -VMName $name-Credential administrator -ScriptBlock {Rename-Computer -NewName $using:name -Restart -whatif}
}
or
$CSVData = import-csv -Path C:\Users\Itay\Desktop\Servers.txt
foreach ($name in $CSVData.newname){
Invoke-Command -VMName $name -Credential administrator -ScriptBlock {
Param($incomingname)
Rename-Computer -NewName $incomingname -Restart -whatif
} -ArgumentList $name
}