https://github.com/theohbrothers/get-duplicateitem

Gets duplicate or non-duplicate files.
https://github.com/theohbrothers/get-duplicateitem

duplicate duplicate-files hash powershell pwsh search unique unique-files

Last synced: about 1 year ago
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Gets duplicate or non-duplicate files.

• Host: GitHub
• URL: https://github.com/theohbrothers/get-duplicateitem
• Owner: theohbrothers
• License: apache-2.0
• Created: 2018-06-14T05:33:38.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2025-02-13T11:22:38.000Z (over 1 year ago)
• Last Synced: 2025-03-26T07:22:18.446Z (over 1 year ago)
• Topics: duplicate, duplicate-files, hash, powershell, pwsh, search, unique, unique-files
• Language: PowerShell
• Homepage:
• Size: 91.8 KB
• Stars: 2
• Watchers: 1
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Get-DuplicateItem

[![github-actions](https://github.com/theohbrothers/Get-DuplicateItem/actions/workflows/ci-master-pr.yml/badge.svg?branch=master)](https://github.com/theohbrothers/Get-DuplicateItem/actions/workflows/ci-master-pr.yml)

[![github-release](https://img.shields.io/github/v/release/theohbrothers/Get-DuplicateItem?style=flat-square)](https://github.com/theohbrothers/Get-DuplicateItem/releases/)

[![powershell-gallery-release](https://img.shields.io/powershellgallery/v/Get-DuplicateItem?logo=powershell&logoColor=white&label=PSGallery&labelColor=&style=flat-square)](https://www.powershellgallery.com/packages/Get-DuplicateItem/)

Gets duplicate or non-duplicate files.

## Install

Open [`powershell`](https://docs.microsoft.com/en-us/powershell/scripting/windows-powershell/install/installing-windows-powershell?view=powershell-5.1) or [`pwsh`](https://github.com/powershell/powershell#-powershell) and type:

```powershell

Install-Module -Name Get-DuplicateItem -Repository PSGallery -Scope CurrentUser -Verbose

```

## Usage

The cmdlet supports the same parameters as `Get-ChildItem`: `-Path`, `-LiteralPath`, `-Include`, `-Exclude`, and `-Recurse`.

Use the `-AsHashtable` switch to get a hashtable containing `[string]$md5 = [System.Collections.ArrayList]$files`.

```powershell

# Get duplicate files in 'C:/folder1' only

Get-DuplicateItem -Path 'C:/folder1'

# Alternatively, you may pipe folder paths

'C:/folder1' | Get-DuplicateItem

# Or DirectoryInfo objects

Get-Item 'C:/folder1' | Get-DuplicateItem

# Get duplicate files in 'C:/folder1' and its descendents

Get-DuplicateItem -Path 'C:/folder1' -Recurse

# Get duplicate files in 'C:/folder1' and its descendents in the form: hash => FileInfo[]

Get-DuplicateItem -Path 'C:/folder1' -Recurse -AsHashtable

# Remove all duplicate items

Get-DuplicateItem -Path 'C:/folder1' | Remove-Item

# Remove all duplicate files in 'C:/folder1' and its descendents

Get-DuplicateItem -Path 'C:/folder1' -Recurse | Remove-Item

```

Use the `-Inverse` switch to get non-duplicates.

```powershell

# Get non-duplicate files in 'C:/folder1' only

Get-DuplicateItem -Path 'C:/folder1' -Inverse

# Get non-duplicate files in 'C:/folder1' and its descendents

Get-DuplicateItem -Path 'C:/folder1' -Inverse -Recurse

# Get non-duplicate files in 'C:/folder1' and its descendents in the form: hash => FileInfo[]

Get-DuplicateItem -Path 'C:/folder1' -Inverse -Recurse -AsHashtable

# Remove all non-duplicate files in 'C:/folder1' only

Get-DuplicateItem -Path 'C:/folder1' -Inverse | Remove-Item

# Remove all non-duplicate files in 'C:/folder1' and its descendents

Get-DuplicateItem -Path 'C:/folder1' -Inverse  -Recurse | Remove-Item

```

## Notes

The cmdlet calculates the md5 hash of each descendent file, to be able to identify duplicates and non-duplicates. Therefore if there are many large descendent files, it is normal for the Cmdlet to take several seconds to several minutes to complete.