Powershell compare files in folders

Community Bot 1. David Smith David Smith 1 1 gold badge 2 2 silver badges 7 7 bronze badges. Add a comment. Active Oldest Votes. Improve this answer. Mark Henderson Why would you extract the actual contents of a file when calling Compare-Object? Thats what Compare-Object does. I know it's an older post but ran into this while searching for an answer.

This is a great answer but the folders I'm comparing are huge and one of them is onedrive. If I put the get-childitem in a variable not only it takes an insane amount of time but it also tries to download all the files from the Onedrive.

I tried piping but no luck. OK, this site is not appropriate for "Give me the codez" type questions. If you need to get started on learning how to do loops in Powershell, buy a book or find online tutorials; there are many. I think you woke up on the wrong side of the bed. I am not a regular Powershell user. I have demonstrated in my question both a technique that I am currently attempting, and a link to a question that has additional helpful information for my problem.

I do not know how to combine the two techniques, which is my problem, and the reason I have asked this question. It is also a question which I have been unable to answer using Google searches. If you aren't going to be helpful, please consider deleting your answer. I did that google search, attempted that technique, and did not succeed. Comparing folders and content with PowerShell Ask Question.

Asked 10 years, 6 months ago. Active 1 year ago. Viewed 75k times. Alexei Levenkov 96k 12 12 gold badges silver badges bronze badges. Keith Keith 1, 10 10 gold badges 32 32 silver badges 46 46 bronze badges. You want to compare based on modified date or do you want to compare file contents?

I want to compare based on file contents. And how do you want to handle files that don't exist in one or the other folder? If files do not exist in folder1 but do exist in folder2, then those files are new and I want to copy them to folder3. If files exist in folder1 but do not exist in folder2, then those are obsolete files so I do not want to copy them but do want to log them.

How do you want to handle files with duplicate contents, but different file names? Show 2 more comments. Active Oldest Votes. For simplicity sake, let's do the easy way and compare file size. Thanks, JNK! If you want to do separate logic for the other files the ones that exist in folder2 but not folder1 then you can just use -property name and reverse the side indicator, then log them or whatever you want. The script above seems to work fine with a flat folder structure, but doesn't seem to work when dealing with folders with sub-directories with files.

Any ideas? How can I use Windows PowerShell to get a hash of a file? Use the Get-FileHash Doctor Scripto April 1, I am having a problem Doctor Scripto April 2, NET Core. Recordset ADOR. Paste your code snippet. Cancel Ok. Scripting Forums. PowerShell Forums. PowerShell on TechCommunity. Doctor Scripto October 9, Scripto Challenge. The Scripting Wife and I are on a road Doctor Scripto October 10, Hi, With that, you only need to create a script to copy the missing files, is there a way to see the lastwritetime for each element?

Best Regards. NET Core. Recordset ADOR.