Well rm -P is going to overwrite the file 3 times anyway right?
arandom is perhaps theoretically 'better', and we know that there are
5% unerased free space... but I think it is up to the reader to decide
if this is enough for them.
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09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0