Renaming Multiple Files using Regular Expressions
Many times I am presented with a set of files whose names I need to rename to fit a certain pattern, for example:
Old file name pg 1.pdf
Old file name pg 2.pdf
etc.
And you want to change it to:
File_name_1.pdf
File_name_2.pdf
etc.
Well I found a nice little utility to to take a set of files and with a little regular expression you can do just this and more: RenameRegEx from 12noon.

RenameRegEx from 12noon
If you love the power of Regular Expressions but don’t have the syntax memorized, check out AddedBytes’ Regular Expressions Cheat Sheet (formerly ILoveJackDaniels.com). This cheat sheet has a permanent position on my desk.

Regular Expressions Cheat Sheet from AddedBytes.com
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