dd is a great tool to fully wipe out your disk data to forensic levels

Securely erase an external disk using dd on OSX · Plug in your SD card, HDD, or other block device and then use the following command to see which /dev/diskN ...

If you messed up your master boot record (MBR) you can wipe it using this command : dd if=/dev/zero of=/dev/hdX bs=446 count=1 #replace X with the target drive ... Wiping the entire disk · Wiping partitions

Be advised this will remove all partition information, but is not a disk wipe or secure delete. If you want to truly be certain that data ...

You can even wipe unallocated disk space with a dd command by calculating the difference between the end of one and start of the next partition.

Explains how remove all partitions, data and create an empty disk under Linux operating systems using the dd or shred or scrub command.

This article shows you the three best ways to completely erase data from your disk using the dd, shred and wipe command.

If you want to wipe your hard drive to clean up partition error, bad installations, or for privacy. This tutorial will help you how to do this.

The above simple command just fills the sda1 partition of your hard disk with binary zeros, thus effectively wiping out your data irrevocably.

Using the dd command. To sanitize a disk using dd, overwrite existing data with random content sourced from the /dev/random special device.

To remove all partitions perform the following steps. First, get a listing of your current partition scheme, type the following command: # fdisk -l.