Question

我正在尝试在远程计算机上运行我想要的任何命令。示例：gpupdate / force或copy file1到file2等...所以我有这段代码：

$ComputerName = Read-Host "Enter a remote computer name"
$RemoteCommand = Read-Host "Enter a remote command to run:  Example   gpupdate /force"

$s = New-PSSession -ComputerName $ComputerName
Invoke-Command -Session $s -ScriptBlock {$RemoteCommand}
Invoke-Command -Session $s -ScriptBlock { $? }

它运行时没有错误，实际上它返回TRUE。但是我在c：\ temp中的文件永远不会被复制到c：\ temp \ tmp

为什么不呢？

Answer 1

问题是您要在脚本块中将字符串变量传递给Invoke-Command，该变量仅求值字符串的内容。您没有向其传递带有实际命令的脚本块。为了说明差异，请参见以下代码：

# Output is just the content of the string
$commandString = "Get-Service spooler"
Invoke-Command {$commandString}

# Output is the result of the commandlet
$scriptBlock = {Get-Service spooler}
Invoke-Command -ScriptBlock $scriptBlock

要获得所需的结果，可以使用[scritpblock]加速器，如下所示：

# Output is the result of the commandlet invocation defined in the string
$commandString = "Get-Service spooler"
$scriptBlock = [scriptblock]::Create($commandString)
Invoke-Command -ScriptBlock $scriptBlock

Answer 2

尝试像这样运行脚本：

Invoke-Command -Session $s -ScriptBlock { powershell.exe -Command "$RemoteCommand"}

如果在转义字符时遇到问题，则还有-encodedCommand开关。从Powershell帮助中：

# To use the -EncodedCommand parameter:   
$command = 'dir "c:\program files" '
$bytes = [System.Text.Encoding]::Unicode.GetBytes($command)
$encodedCommand = [Convert]::ToBase64String($bytes)
powershell.exe -encodedCommand $encodedCommand

在远程计算机上运行Invoke-Command

2 个答案: