ubuntu11.04国内源
/etc/apt/sources.list
sudo cp /etc/apt/sources.list /etc/apt/sources.list.back
sudo gedit /etc/apt/sources.list
sohu源
------------------------------------------------------------
deb http://mirrors.sohu.com/ubuntu/ natty main restricted
deb-src http://mirrors.sohu.com/ubuntu/ natty main restricted
deb http://mirrors.sohu.com/ubuntu/ natty-updates main restricted
deb-src http://mirrors.sohu.com/ubuntu/ natty-updates main restricted
deb http://mirrors.sohu.com/ubuntu/ natty universe
deb-src http://mirrors.sohu.com/ubuntu/ natty universe
deb http://mirrors.sohu.com/ubuntu/ natty-updates universe
deb-src http://mirrors.sohu.com/ubuntu/ natty-updates universe
deb http://mirrors.sohu.com/ubuntu/ natty multiverse
deb-src http://mirrors.sohu.com/ubuntu/ natty multiverse
deb http://mirrors.sohu.com/ubuntu/ natty-updates multiverse
deb-src http://mirrors.sohu.com/ubuntu/ natty-updates multiverse
deb http://mirrors.sohu.com/ubuntu/ natty-security main restricted
deb-src http://mirrors.sohu.com/ubuntu/ natty-security main restricted
deb http://mirrors.sohu.com/ubuntu/ natty-security universe
deb-src http://mirrors.sohu.com/ubuntu/ natty-security universe
deb http://mirrors.sohu.com/ubuntu/ natty-security multiverse
deb-src http://mirrors.sohu.com/ubuntu/ natty-security multiverse
deb http://archive.canonical.com/ubuntu natty partner
deb-src http://archive.canonical.com/ubuntu natty partner
deb http://extras.ubuntu.com/ubuntu natty main
deb-src http://extras.ubuntu.com/ubuntu natty main
------------------------------------------------------------