Torben Sorensen
b0036faa0a
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58 lines
2.2 KiB
PowerShell
58 lines
2.2 KiB
PowerShell
<#
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.SYNOPSIS
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Scans a directory and its subdirectories to find duplicate files based on content.
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.DESCRIPTION
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This script recursively searches through a specified directory, calculates the SHA256 hash
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for each file, and then groups files by their hash. It reports any groups of files
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that have identical hashes, as these are content-based duplicates.
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.EXAMPLE
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.\Find-Duplicates.ps1
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(After setting the $targetDirectory variable inside the script)
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#>
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# --- CONFIGURATION ---
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# Set the directory you want to scan for duplicates.
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# IMPORTANT: Replace "C:\Path\To\Your\Directory" with the actual path.
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$targetDirectory = "C:\Path\To\Your\Directory"
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# --- SCRIPT ---
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# Check if the target directory exists
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if (-not (Test-Path -Path $targetDirectory -PathType Container)) {
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Write-Host "Error: The directory '$targetDirectory' does not exist." -ForegroundColor Red
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# Exit the script if the directory is not found
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return
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}
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Write-Host "Scanning for duplicate files in '$targetDirectory'..." -ForegroundColor Yellow
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Write-Host "This may take a while for large directories..."
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# 1. Get all files recursively from the target directory.
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# 2. Calculate the SHA256 hash for each file.
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# 3. Group the files by their calculated hash.
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# 4. Filter the groups to find those with more than one file (i.e., duplicates).
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$duplicateGroups = Get-ChildItem -Path $targetDirectory -Recurse -File | Get-FileHash -Algorithm SHA256 | Group-Object -Property Hash | Where-Object { $_.Count -gt 1 }
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if ($duplicateGroups) {
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Write-Host "`nFound duplicate files:" -ForegroundColor Green
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# Loop through each group of duplicates and display the information
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$duplicateGroups | ForEach-Object {
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Write-Host "`n--------------------------------------------------"
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Write-Host "The following files are identical (Hash: $($_.Name)):" -ForegroundColor Cyan
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# List all files within the duplicate group
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$_.Group | ForEach-Object {
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Write-Host " - $($_.Path)"
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}
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}
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Write-Host "`n--------------------------------------------------"
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Write-Host "Scan complete." -ForegroundColor Green
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}
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else {
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Write-Host "`nNo duplicate files found in '$targetDirectory'." -ForegroundColor Green
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}
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