Specific LiveCD
Knoppix primary function is desktop and OS replacement. Knoppix is a popular LiveCD with set of tools with the ability to perform almost any task. Knoppix includes the tools that do not require downloading such as Ethereal, OpenOffice, FireFox, etc. It supports many graphics cards, sound cards, SCSI and USB devices. Knoppix is a great productive Linux system for the desktop, educational, rescue system.
I would prefer to use shred utility with Knoppix. Knoppix offers the shred utility which shreds the hard drive. Knoppix is a very easy to use LiveCD distribution. According to DistroWatch Knoppix is a #1 LiveCD. There are also books written about Knoppix where you can find how to use shred utility and other tools. The vast amount of utilities available is capable of handling all three security controls: technical, management, and operational.