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copied!<p>This would handle any number of underscores in filename (ignoring the path) and skip everything up to and including the last underscore when generating new name:-</p> <pre><code>Get-ChildItem 'C:\somedir' -Filter *.pdf |` %{Rename-Item $_.Fullname ($_.Name.Split("_")|` select -last 1)} </code></pre> <p>You can test using the -whatif switch on the rename-item command e.g</p> <pre><code>gci 'R:\TECH' -Filter *.pdf|` %{rename-item -whatif $_.Fullname ($_.Name.Split("_")|` select -last 1)} </code></pre> <p>Returns:</p> <p>What if: Performing operation "Rename File" on Target "Item: R:\TECH\38415_JOBS121121155535240.pdf Destin ation: R:\TECH\JOBS121121155535240.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\CHG38415_JOB_121112153717550.pdf Des tination: R:\TECH\121112153717550.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\CHG38415_PREH_121113152548740.pdf De stination: R:\TECH\121113152548740.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\CHG38415_PREI_121113152600640.pdf De stination: R:\TECH\121113152600640.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\MCPTEST121125121201390.pdf Destinati on: R:\TECH\MCPTEST121125121201390.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\PREHAND_38415_121121154127000.pdf De stination: R:\TECH\121121154127000.pdf". What if: Performing operation "Rename File" on Target "Item: R:\TECH\PREIMP_38415_121121154140630.pdf Des tination: R:\TECH\121121154140630.pdf".</p>

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