You're going to have to reformat your drive and install fresh in that case...
Don't know what else to tell you.
Careful what you delete, especially with "root" access.
You don't necessarily need to reformat your drive. Just use your original Jaguar installer, use "Archive and Install" to install over the current system, recreate your admin account, and move over files from the archived system.
"/etc" is a symbolic link, so you don't need to reinstal. But the fix involves typing commands in single user mode. None of the commands are 'dangerous' but you obviously need to be careful.
Start up in single user mode by holding down 'Command' and 's' and wait for the white text on black background to stop. Then type:
Code:
[color=green]/sbin/fsck -y[/color]
and repeat until it says your disk appears to be OK. Then continue with: