Knoppix is a bootable Linux distro that runs in a RAM disk. This is a great idea if you want to try Linux without installing a full distro on your hard drive. The distro loads directly from the CD-ROM, and drops users into a KDE desktop. A special “STD” distro includes tools commonly used by security professionals. I think I’ll try STD next, but for testing purposes won’t burn the.iso to a CD-rom in VMWare.”]
Source: https://taosecurity.blogspot.com/2003/08/knoppix-several-people-have-told-me-to.html