On 2012-11-16 15:36, Gordon Burgess-Parker wrote: > On 16/11/12 14:55, Alan Pope wrote: >> but then discovered dd'ing zeroes over it from a live CD was sufficient, >> so I just do that from a live CD/USB now. > > Can you expand on that for a newbie?
dd if=/dev/zero of=/dev/sda You might use "bs=1M" or some other value if you think certain block sizes improve efficiency. Alan, the above is exactly what happens if you do this: shred -v -n 1 -z /dev/sda Only with shred you get useful progress output, and can optionally do more passes with more secure data. shred is part of coreutils and is included on all Ubuntu Live CDs. Regards, Tyler -- "It is an interesting and demonstrable fact, that all children are atheists and were religion not inculcated into their minds, they would remain so." -- Ernestine Rose -- ubuntu-uk@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
