Wiping a drive erase data permanently

Wiping a drive erase data permanently

Boot from a Linux Live CD.
Open a terminal as root.

Run:
# cat /dev/zero > /dev/hda

(Suppose that HDD or partition is hda.)

If you are not sure about it, than:
# fdisk -l

But you can use these Windows based softwares also:

Hard Disk Wipe Tool

Disk Wipe

Available link for download

download
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