经典的powershell example1

老外写的一个比较经典的powershell example

# Functionto check if $Server is online

FunctionCanPing ($Server) {

   $error.clear()

   $tmp = Test-Connection $Server -ErrorActionSilentlyContinue

   if ($?) {

       Write-Host "Ping succeeded:$Server"; Return $true

   }

   else {

        Write-Host "Ping failed:$Server."; Return $false

   }

}

# Functionto check if $Server is remotely accessible

FunctionCanRemote ($Server) {

    $s = New-PSSession $Server -AuthenticationCredssp -Credential $Credentials -Name "Test" -ErrorActionSilentlyContinue

    if ($s -is[System.Management.Automation.Runspaces.PSSession]) {

        Enter-PSSession -Session $s

        Exit-PSSession

        Write-Host "Remote test succeeded:$Server."; Return $true

    }

    else {

        Write-Host "Remote test failed:$Server."; Return $false

    }

}

# Executefunctions to check $Server

if ($Server-ne "UNC") {

    if (CanPing $Server) {

        if (-Not (CanRemote $Server)) {

        Write-Host "Exit loop REMOTE"-ForegroundColor Yellow

        continue

        }

    }

    else {

         Write-Host "Exit loop PING"-ForegroundColor Yellow

         continue # 'continue' to the nextobject and don't execute the rest of the code, 'break' exits the foreach loopcompletely

    }

}

改进:

# Function to check if $Server is remotely accessible

Function CanRemote ($Server) {

  Try {

   $s = New-PSSession $Server -Authentication Credssp -Credential $Credentials -Name "Test" -ErrorAction Stop

   Write-Host "Remote test succeeded: $Server."

   $true

   Remove-PSSession $s

   }

  Catch {

          "Remote test failed: $Server."

          $false

        }

 }