I have seen this quite a few times. In some random directories there is usually a .uuid file or directory therein. The directories are nothing special so as to speak. They are mostly random media files or files I have downloaded from somewhere or the other. Then why do these uuid files exist. The filesystem is ext4 and am using Debian buster.

  • I don't think this has anything to do with ext4, those files must be created by some application. You could try using file <path_to_file.uuid> to see what kind of file it thinks this is. – LustreOne May 27 '19 at 20:59

Do the random files include any font files, or files with a filename suffix matching those of any font file types? And does your desktop environment include a tool or library that would produce a preview of font files, or a custom icon for them?

fontconfig creates .uuid files in directories like ~/.fontconfig. I guess some sort of font previewer might be doing its job by invoking fontconfig with a custom directory, and thus cause the .uuid files be dropped into directories where possible font files exist.

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  • ah, that might be possibility as some of the files or media files where I have it do have subtitles sometimes although they are in .srt format, but maybe fontconfig might be doing something with that. Is there anyway to know more ? – shirish May 26 '19 at 6:46

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