Using Ubuntu installer CD to securely erase a hard drive

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In most instances, when you have an old hard disk you want to erase, I would say go and download the latest version of DBAN (http://www.dban.org/) and wipe away! However, I have found that on occasion, depending on the hardware being used, you may not be able to boot off the DBAN disk. I had one such instance where I was trying to erase the hard drive in a Lenovo ThinkPad T61. DBAN kept crashing during boot, presumably as it tried to come to terms with the fact the machine has an inbuilt SD card reader. In the end I gave up on DBAN and did the following:

1. Downloaded an ISO of the latest Ubuntu installer releast, in this case 11.04, and burnt it to CD.

2. Booted off the CD.

3. When asked if I wanted to Try Ubuntu or Install Ubuntu, I chose to Try it!

4. Once into the Ubuntu environment, I fired up the Terminal program.

5. Became the root user

  sudo bash

6. Used shred to erase the drive:

  shred