Boot Linux from a FireWire device
Obtaining an external drive is a great way to breathe new life into older hardware, or allow you to use Linux on machines on which you can't (or don't want to) alter the internal hard drives.
Say you want to use Linux in a dual-boot arrangement, but you don't have any free space on your computer's hard drive. One solution would be to use a "live" Linux distribution such as Knoppix, which can be run directly from CD. This is certainly viable for occasional use, but it has a number of serious drawbacks.
