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Date: Wed, 27 Jan 2010 14:16:12 -0500
From: "Aryeh M. Friedman" <aryeh.friedman@gmail.com>
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Subject: OT: finding every file not in a list
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I have a list of files that should be in a dir tree and want to remove 
any files from the tree not in list (i.e. if it is on the list keep it 
else rm it)... any quick way to do this?