I have also seen enough buggy RAID controllers in my day to make me very wary of that 2D raid arrangement in the paper.
All in all this smells like a mathematicians solution to the problem, largely unbounded by real life concerns.
Looks like fetch works though. If anybody else has trouble getting the file, try my local mirror.
Er, helicopter. I just woke up.
grep: Global Regular Expression Print -- Ok, still pretty bizarre sounding if you're not a bearded unixguy
man: Short for MANual. Straightforward.
awk: Beats me. I think it's named after the author's initials or something
sed: Stream EDitor: does what it says, edits streams of characters