Ubuntu下的使用方法:
使用如下命令：sudo gedit /etc/apt/sources.list
请编辑/etc/apt/sources.list，用下面的内容替换：
deb http://mirrors.ustc.edu.cn/ubuntu/ natty main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ natty-backports main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ natty-proposed main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ natty main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ natty-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ natty-proposed main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ natty-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ natty-updates main restricted universe multiverse