Isn't this what eventually became Kali linux? I remember Knoppix and Whoppix then I didn't really check on the projects for a while then Kali came along
I remember using PHLAK (Professional Hackers Linux Assault Kit) that I'm pretty sure was based on Knoppix. I don't know if PHLAK actually had any pedigree heading into Kali, but Kali stepped up when PHLAK stopped.
Kali was Backtrack before which was built on Whax which was based on Slackware.
There was a Knoppix STD (security tools distro), I remember using that in the mid/early 00s.
I remember burning this on a CD as a preteen. It's what got me into Linux. It blew my mind that an OS could be live-loaded off a disk. Ever since then, I tried to daily drive linux, but came back to Windows again and again for gaming...until this year.