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RELATED: You Only Need to Wipe a Disk Once to Securely Erase It Shredding Multiple FIles But is it less secure? Three passes, interestingly, is probably more than enough. To get three passes in total, we request an extra two passes: shred -uvz -n 2 Preliminary_Notes.txt_02.txtįewer passes-fewer shreddings if you like- is obviously faster. So shred will always do one more pass than the number we ask for. The number we provide here is the number of extra passes we require shred to perform. We can ask shred to use more or fewer overwrite passes by using the -n (number) option.
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