单台服务器上的get-hotfix

Question

第一次使用powershell时，我似乎无法让下面的代码正常工作--没有显示任何内容--我认为脚本可以工作，但我想我需要一些东西来显示结果？如果有任何帮助，请：

$hotfix1 = Get-HotFix -Id KB981872

If($hotfix)
{
$Output = "Hotfix is installed you may proceed"
}
else
{
$Output = "Hotfix is not installed"
}
$hotfix1 = Get-HotFix -Id KB981872

谢谢Shay -我已经将其更新为：

 write-host "This will check if Hotfix KB979808 is installed on this Server." -ForegroundColor 

Black -BackgroundColor Cyan
write-host "This is required for Windows Server 2008 R2 DFSR Pre-Seeding Robocopying"  -

ForegroundColor Black -BackgroundColor Cyan
Write-Host ""

$hotfix1 = Get-HotFix -Id KB979808 -ErrorAction SilentlyContinue

If($hotfix1 -match "KB979808")
{
    Write-Host "Hotfix is installed you may proceed" -foregroundcolor "green"
    Write-Host ""
}
else
{
    Write-Host "Hotfix is NOT installed - Please ensure you install this hotfix BEFORE"
    Write-host "copying any data" -foregroundcolor "red"
    Write-Host ""
}

Answer 1

代码不会输出任何内容，因为您将其赋给了一个变量。删除分配。您还将命令输出分配给$hotfix1，但在if语句中对照$hotfix进行检查。此外，如果找不到热修复程序，您将得到一个错误，因此添加-ErrorAction参数以抑制错误：

$hotfix1 = Get-HotFix -Id KB981872 -ErrorAction SilentlyContinue

If($hotfix1)
{
   "Hotfix is installed you may proceed"
}
else
{
    "Hotfix is not installed"
}

$hotfix1