Changed my system

Change to Ubuntu 9.10 from Debian 5.0.

Didn't expect to be so much trouble.

First, the network really gave a hard time. Since I changed my motherboard couple of weeks ago. I have to modify my MAC so that I can connect to the Internet. Certainly, doing this kind of things would require root privilege, but the installing never queried me for root password. After a few googling, the answer came up:
sudo passwd root
That would do the trick;

Second, adobe flash player, SJTU's network is so bad that downloading a 3.7 megabytes software would require a whole hour.