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Executing external program with PowerShell

Posted on 2014-02-10
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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 10.10.10.5 -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.
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Question by:McThump
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3 Comments
 
LVL 19

Expert Comment

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

$arg1 = "10.10.10.5"
$arg2 = "-ssh"
$arg3 = "-P"
$arg4 = "1234"
$arg5 = "-l"
$arg6="username"
$arg7="-pw"
$arg8 = "xyz"
$arg9="< %temp%\script.txt"

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

 & "C:\PuTTY\plink.exe"  $args
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Accepted Solution

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Qlemo earned 500 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 10.10.10.5 -ssh -P 1234 -l username -pw xyz < $env:Temp\script.txt

Open in new window

or, more Powershell'ish:
Get-Content $env:Temp\script.txt | C:\PuTTY\plink.exe 10.10.10.5 -ssh -P 1234 -l username -pw xyz

Open in new window

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Author Closing Comment

by:McThump
ID: 39851157
Works perfectly.  Thanks!!
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