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grep -Zpart, then yes: it produces a list of NUL terminated filenames, just likefile -print0does. The complete sequence produces nothing as output, it just moves the files. If you are new at this, it often helps to make a few files with known simple content ('aa', 'ab', or 'bb') in small directory hierarchy, under a new directory and try the commands out. Make it simple enough so that you know what should happen if you run such a sequence and can check the results.