Urgent!Chmod -R 660 * under /,and can not start system anymore...

[Sun Le]

Hi,guys

I did some really stupid operations and met some problems need to
solve right now.

I changed the mode of all my directories under `/'  to 660,and now I
can not launch the system anymore.....How can I solve the  stupid
problem? It is urgent!

Anyway....I will very much appreciate any suggestion and
solutions....Thanks very much in advance !

Regards

Sun .L