PowerShell: Delete specific files recursively / recursive

Okay, this post I’m going to write down for my personal notes but also for you..
Ever needed to delete a specific file, in my case in need to delete (remove-item) all *.pdb files in one of my Visual Studio Solution.. recursive of course.
To get a list of Files use the Get-ChildItem CmdLet. Extend that command using the –rec or –recurse parameter – so you’ll get all the files recursively, starting from the current path / directory.
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Now, we don’t need all the file, but all the files with a specific extension. We’ll use the Where-Object to achieve this. Well if you do Get-ChildItem you’ll get something like:

PS D:\DEMO> Get-ChildItem

    Directory: D:\DEMO

Mode                LastWriteTime     Length Name
—-                ————-     —— —-
d—-        19.02.2010     13:16            DEMO Folder
-a—        19.02.2010     13:17         18 someFile.ext

PS D:\DEMO>

 

So, how to get only files with a specific extension? Easy, using Get-Member we can list all properties of Get-ChildItem.

PS D:\DEMO> Get-ChildItem | Get-Member

   TypeName: System.IO.DirectoryInfo

Name                      MemberType     Definition
—-                      ———-     ———-
Mode                      CodeProperty   System.String Mode{get=Mode;}
Create                    Method         System.Void Create(System.Security.AccessControl.DirectorySecurity director…


Extension                 Property       System.String Extension {get;}

FullName                  Property       System.String FullName {get;}

PS D:\DEMO>

 

When we want to search for a specific File Type, the Extension Property comes in very handy.

So, to get a list of all, let’s say *.tmp files recursively, we’ll write:

PS D:\DEMO> Get-ChildItem -Rec | Where {$_.Extension -match "tmp"}

    Directory: D:\DEMO

Mode                LastWriteTime     Length Name
—-                ————-     —— —-
-a—        19.02.2010     13:22         12 demo.tmp

    Directory: D:\DEMO\DEMO Folder

Mode                LastWriteTime     Length Name
—-                ————-     —— —-
-a—        19.02.2010     13:22         12 dem32.tmp
-a—        19.02.2010     13:22         12 demo2.tmp

PS D:\DEMO>

 

Now, let’s delete all of these *.tmp files using Remove-Item

PS D:\DEMO> Get-ChildItem -Rec | Where {$_.Extension -match "tmp"} | Remove-Item

and they are all gone!

5 thoughts on “PowerShell: Delete specific files recursively / recursive

  1. I finally decided to take a look at Powershell out of necessity at work. I remember a friend telling me years ago that I should try it out. Geez…I wish I had of listened to him then.

    Thanks heaps for this – it is saving me a huge amount of time in organizing 100s of GBs of files on our corporate network drive.

  2. How do I save a file, without being able to enter or extract informatioen. On all my files I want to avoid “read only”, and not be able to print my files? I have Office Home and Student 2007. May be I wasn’t suppose to ask a question…but live on disability and can’t afford $38.00 to get a question answered.

  3. yeah, you really should look into powershell. it’s a mighty tool to organize and manage your systems. especially managing remote systems really rocks!

  4. Based on what you’ve written here, I guess if I want to find all files which have a numeric name larger than say X, then I have to write:

    get-childitem | where {$_.name -gt X} | remove-item

    Is this right?

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