Duplicate file finders can use different methodologies to find duiplicates. Some simply compare file names or types while others compute hashes or use algorithms to find duplicate files even if the size of the files is not the same. Duper is a free program for Windows, Linux and Mac that checks the file size of all files stored in the directories that the user wants to scan for duplicate files and computes hashes of all files of the same file size.
Experienced users know that this methodology can only uncover identical files but not duplicate files that do not have the same file size. Two photos that show the same scenery would for instance not be detected as duplicates if their file size would not be identical (that is the case if they have different resolutions for instance).
The hash generation on the other hand ensures that only absolute identical files will be detected as duplicates which might be exactly what the user wants to achieve. The program uses Java which is the reason why it is compatible with Windows, Linux and Mac. It does however mean that Java needs to be installed on the computer system.
The user can add one or multiple directories in the program interface. All, including their subdirectories, will be scanned for duplicate files. An option is provided to exclude files from the scan by either using wildcards or regular expressions.
All duplicate files are displayed after the scan in the interface. They are grouped together to make the identification easier. Each result can be checked individually or by using the pulldown menu at the bottom to make the selection (for instance all but the newest, all but the first or all files).
Duper is available from the developer’s website. It is compatible with 32-bit and 64-bit editions of Windows. (via Addictive Tips)
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It would be great – if i can see the screenshot of the application above more clearly – please try to make them visible so that readers can see what is actually going in the screenshot.
anyways thanks for this utility :)