DupFinder is a lightweight utility designed to locate and clean up identical files on your storage drive. Depending on which version you are using, it is typically encountered either as a command-line tool (such as the Go-based DupFinder or yohannesHL’s utility) or as part of a system maintenance bundle. How DupFinder Finds Duplicates
Instead of relying solely on file names (which can be misleading), DupFinder primarily utilizes cryptographic hashing.
It scans your files and assigns a unique signature (a hash) to each one based on its actual content.
If two files have different names but identical content, they will produce the exact same hash.
This allows the tool to spot accurate matches regardless of where they are hidden or what they are titled. Step-by-Step: Using the Command-Line Tool
If you are using the terminal-based utility, it relies on strict commands to execute scans and handle files safely. 1. Run a Basic Scan
To search a specific folder for duplicates without deleting anything immediately, point the tool to your directory: dupfinder Use code with caution. 2. Save the Results
You can export the list of discovered duplicates to a JSON file to review them before making any changes: dupfinder Use code with caution. 3. Deduplicate with a Safety Net (Recommended)
To automatically delete the duplicate files but keep a backup copy of what was removed, use the -d or –dedup flag. This automatically moves deleted files to a temporary ./backup folder: dupfinder Use code with caution. 4. Force Delete (Permanent)
If you want to clear the space instantly without generating a backup folder, combine the deduplication flag with the force flag: dupfinder Use code with caution. Step-by-Step: Using the GUI Feature
If your variant of DupFinder uses a Graphical User Interface (GUI), the process is visual and straightforward:
Target the Scan: Open the app and click Select Folder to choose your target directory, or select the option to scan the entire computer.
Execute: Click the Scan button to let the application index and hash your files.
Review: Once the process finishes, the app displays a grouped list of identical items.
Select & Remove: By default, the original file is left unchecked while the duplicate copies are automatically selected. Review the list to confirm, then click Delete. ⚠️ Essential Safety Practices
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