After losing power, my machine rebooted to this error:
“error: no init found. Try passing init=bootarg”
Per similar threads on this site and others, I've tried booting from a CD and selecting "Try Ubuntu". Then open a terminal and typing:
sudo fsck-y /dev/sda1.
The response is:
Device or resource busy while trying to open /dev/sda1. Filesystem mounted or opened exclusively by another program?
This is on Ubuntu 10.10.
Any ideas on what I can try next?