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by DannyBee 3681 days ago
"That's only true for GNU-based userlands, not BSD-based ones. "

  RM(1)                     BSD General Commands Manual                    RM(1)
...

  -P          Overwrite regular files before deleting them.  Files are
              overwritten three times, first with the byte pattern 0xff,
              then 0x00, and then 0xff again, before they are deleted.