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I have over 100 PuTTY sessions saved, and I wanted to increase my Lines of Scrollback from 200 to something higher like 5000.

I know how to do this manually, one by one. However I don't want to spend my whole day doing this, does anyone know how to do it in a faster manner?

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up vote 1 down vote accepted

From Windows PowerShell run the following command

Get-ItemProperty -Path HKCU:\Software\SimonTatham\PuTTY\Sessions\* | foreach-object {set-itemproperty -path $_.pspath -name ScrollbackLines -value "5000"}
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Maybe this helps:

enter image description here

The registry location is

HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions

Don't know how to automate it (yet). Short on time.

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2  
My method for doing it quickly was just to export that portion of the registry, and do a search and replace with a text editor on the .reg file, then re-import. – Zoredache May 23 '12 at 18:40

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