I just wrote a script to find all overlay2//diff which are used by any image, and compared that to the overlay2//diff directories that exist, and there are 436 diff directories unused by any image (there are no containers)
I just wrote a script to find all overlay2//diff which are used by any image, and compared that to the overlay2//diff directories that exist, and there are 436 diff directories unused by any image (there are no containers)