powershell - How do I pass a local variable to a remote `Invoke-Command`?

Question

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Answer 1

In PowerShell 4 (3+ actually) the easiest way is to use the Using scope modifier:

Invoke-Command -ComputerName winserver -ScriptBlock { 
    Get-FileHash E:est$Using:dest.zip -Algorithm SHA1 
}

For a solution that works with all versions:

Invoke-Command -ComputerName winserver -ScriptBlock {
    param($myDest)

    Get-FileHash E:est$myDest.zip -Algorithm SHA1 
} -ArgumentList $dest