测试连接 powershell

Question

我是 PS 的初学者，但我试图让我的生活更轻松，创建一个重新启动计算机的按钮，然后告诉我它何时在线。 我一直在尝试 -Wait 参数，但会抛出错误。 如果有人能指出我正确的方向，那就太好了。

Restart_Computer_Click ={
$again = 1

While($again -ne 'N'){
  $ComputerName = Read-Host "ComputerName"
  #output online
  if (Test-connection $ComputerName -quiet -count 2){
    write-host -foregroundcolor green "$ComputerName is online"
    Restart-computer -computername $ComputerName -Force -Confirm
  }
  else{
   #output -offline
   write-host -foregroundcolor red "$ComputerName is offline"
  }
  $again = read-host "Reboot Again? y/n"
  $again.toUpper() | out-null
}

}

Answer 1

真幸运——我实际上已经在这个问题上花费了大量时间，因为我每个月都必须重新启动数百台服务器以应用更新。 我了解您希望 -wait 命令能做什么，恐怕我知道它为什么不起作用。 restart-computer 命令只是向计算机发送重新启动信号。 powershell 中没有内置逻辑来说“重新启动计算机并等待它重新联机”，因此等待命令将无济于事。

相反，您的脚本需要几个额外的步骤：

• 检查计算机的上次重新启动时间（这将告诉您它是否已重新启动）
• 检查系统是否已完全启动备份
• 如果重新启动未完成，请暂停一下，然后重试

请参阅下面的修改后的代码。 我尝试添加大量评论，以便您可以看到我在添加步骤时的逻辑。 我不得不将我的脚本从针对多台计算机运行调整为单台计算机，但这应该可以解决问题。 我的一个假设是您已经弄清楚了脚本的按钮单击部分，只需要帮助等待重新启动。

Restart_Computer_Click =
{
    $computer = "localhost"
    $again = 1
    While ($again -ne 'N')
    {
        $ComputerName = Read-Host "ComputerName"
        
        #output online
        if (Test-connection $ComputerName -quiet -count 2)
        {
            write-host -foregroundcolor green "$ComputerName is online"
            Restart-computer -computername $ComputerName -Force -Confirm
            $online = $true
        }

        else 
        {
            #output -offline
            write-host -foregroundcolor red "$ComputerName is offline"
            $online = $false
        }

        # There's no point in checking the reboot sequence if the computer is offline, so 
        # let's ignore the process if its offline

        if ($online -eq $true)
        {
            # here's the while loop that will keep checking for the status of the rebooted computer
            while ($reboot_complete -ne $true)
            {
                # First, let's sleep for two minutes to give the system time to reboot
                # My systems generally have to install updates, so I have to grant a
                # generous reboot time
                start-sleep -Seconds 120

                # If the computer is in the middle of restarting, we can't check the boot status, so we
                # need to wait a little longer
                if (Test-Connection $computer -quiet -count 1)
                {
                    $lastboot = Get-WMIObject Win32_OperatingSystem -ComputerName $computer -EA SilentlyContinue
                    $lastbootdate = $lastboot.converttodatetime($lastboot.LastBootUpTime)
                    $time_elapsed = (get-date) - $lastbootdate

                    # This is the main statement that's going to tell us if the system has rebooted
                    # The time elapsed is the time difference between right now and the time the computer 
                    # was last rebooted. The time elapsed is basically the difference in time. If there's
                    # less than 10 minutes of difference, I assume its rebooted from the script. If its 
                    # older than that, I assume it hasn't rebooted yet. For example, you can pull a system's 
                    # time while its applying updates as part of the reboot process.
                
                    if ($time_elapsed.TotalMinutes -lt 10)
                    {
                       $reboot_complete = $true     
                    }
                }
            }
        }





        $again = read-host "Reboot Again? y/n"
        $again.toUpper() | out-null

    }
}