Noob reporting:

I've encountered problems at step 7 of this guide. Here's what I'm getting (verbatim):

sudo gainroot
/home/user # cd /home/user/bin
/home/user/bin # ./nupgrade 0
/bin/sh: ./nupgrade: not found
/home/user/bin #

Should I be typing in "./nupgrade.sh 0"?

I'm running IT2006 on n770, and I should add that I've checked in the /home/user/bin directory and both nupgrade.sh and tar are present.