！壞人必需做好事！

sudo passwd root

感謝ubuntu 安裝硬碟分割說明
http://www.linuxbsdos.com/2011/05/05/how-to-install-ubuntu-11-04-on-a-btrfs-file-system/

samba的restart方法
sudo service smbd start
sudo service smbd stop
sudo service smbd restart

force user = your-user-name

reference:

http://ubuntuforums.org/showthread.php?t=1756575
http://linux.vbird.org/linux_server/0370samba.php
http://blog.segaa.net/blog.php/1/post/6/1221
http://community.linuxmint.com/tutorial/view/562
http://www.liberiangeek.net/2010/04/how-to-quickly-share-files-between-windows-and-linux-mint/