POWERSHELL-获取服务中的变量-名称$ Var

Question

Here my script :

Relance de Service sur machine distante

Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope CurrentUser -Force
$passwd = ConvertTo-SecureString -AsPlainText -Force -String PASSWORD #Remplacer 'Password' par votre Mot de passe Datacenter
$cred = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList "LOGIN",$passwd #Remplacer 'login' par votre login datacenter
$Server = Read-Host -Prompt 'Veuillez entrer le nom du serveur'
$session = New-PSSession -ComputerName $Server -Credential $cred
$Service = Read-Host -Prompt 'Veuillez entrer le nom du service'
Invoke-Command -Session $session -ScriptBlock {$A = get-service -Name $Service}
if ($A.Status -eq "Stopped") {$A.start()}
elseIf ($A.status -eq "Running") {Write-Host -ForegroundColor Yellow $A.name "is running"}
Get-PSSession | Remove-PSSession

My script is almost working, but i've got an 'error' or i missed something. When i use prompt to get the server name $Server and put it in the variable everything is ok. But when i use prompt to get the Service name in a variable $Service, and use get-service -name $Service, it doesn't work. Why? Could you help me please?

Answer 1

Your issue is not with Get-Service but with Invoke-Command . The variable $Service you use is not passed from your session to the invoked command. There are multiple options to do this:

By param (as Paxz mentioned in comments):

-ScriptBlock {param($Service) $A = get-service -Name $Service} -ArgumentList $Service

By using: :

-ScriptBlock {$A = get-service -Name $using:Service}

By argument directly:

-ScriptBlock {$A = get-service -Name $args[0]} -ArgumentList $Service

Also keep in mind the scope of variables while trying to restart them.

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Some useful links to check when it comes to passing variables to remote sessions:

• PowerShell: Passing variables to remote commands
• How to pass arguments for remote commands