或
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BC8EBFE8
sudo gedit /etc/apt/sources.list
deb http://ppa.launchpad.net/network-manager/trunk/ubuntu karmic main
deb-src http://ppa.launchpad.net/network-manager/trunk/ubuntu karmic main
sudo aptitude update
sudo aptitude safe-upgrade
sudo gedit /etc/NetworkManager/nm-system-settings.conf
managed＝true
sudo gedit /etc/network/interfaces
auto lo
iface lo inet loopback
sudo rm -rf /etc/resolv.conf
sudo /etc/init.d/network-manager restart
