Photo Agent
Duplicate Photo Finder and Cleaner for Linux
...If the directory you're pointing to is very large or complex, the program may freeze for a moment when you press the scan button. This is normal (pre-scanning and pre-hashing content detection). The scan will then begin, and you'll see the progress bar animate. Once complete, it will display the contents as shown in the image. Github: https://github.com/shampuan/Photo-Agent