Executing external program with PowerShell

Posted on 2014-02-10
Medium Priority
Last Modified: 2014-02-11
I need a PowerShell script to (among other things) execute commands (contained in script.txt) on a remote system.  The following works if I put it in a Windows command file (.cmd).  

C:\PuTTY\plink.exe -ssh -P 1234 -l username -pw xyz < %temp%\script.txt

How can I do this inline in PoweShell?  I expect I'll need to use the invoke-expression comdlet, but can't figure out how to handle the parameters and input redirection.
Question by:McThump
LVL 19

Expert Comment

by:Raheman M. Abdul
ID: 39849846
Try this:

$arg1 = ""
$arg2 = "-ssh"
$arg3 = "-P"
$arg4 = "1234"
$arg5 = "-l"
$arg8 = "xyz"
$arg9="< %temp%\script.txt"

$args = @($arg1,$arg2,$arg3,$arg4,$arg5,$arg6,$arg7,$arg8,$arg9)

 & "C:\PuTTY\plink.exe"  $args
LVL 72

Accepted Solution

Qlemo earned 2000 total points
ID: 39850538
That's a pretty awful way to supply arguments. And it won't work, in particular the input redirection.
You should not need to do anything special here. The only change needed is to replace %temp% with $env:Temp
C:\PuTTY\plink.exe -ssh -P 1234 -l username -pw xyz < $env:Temp\script.txt

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or, more Powershell'ish:
Get-Content $env:Temp\script.txt | C:\PuTTY\plink.exe -ssh -P 1234 -l username -pw xyz

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Author Closing Comment

ID: 39851157
Works perfectly.  Thanks!!

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