Created
July 21, 2015 05:04
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| sudo shred -n 3 -v /dev/hdb | |
| sudo shred -z -v /dev/sdb # -n 25 and write NULL (0) finally | |
| # ref. http://www.atmarkit.co.jp/flinux/rensai/linuxtips/662delfile.html |
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