这里鄙视一下百度开放云的服务器，居然连自己的debian apt源过期都不处理。
现在我们使用163的源,把之前文件里的内容清空然后填入新的源。
vi /etc/apt/sources.list
deb http://mirrors.163.com/debian wheezy main non-free contrib deb http://mirrors.163.com/debian wheezy-proposed-updates main contrib non-free deb-src http://mirrors.163.com/debian wheezy main non-free contrib deb-src http://mirrors.163.com/debian wheezy-proposed-updates main contrib non-free deb http://mirrors.163.com/debian-security wheezy/updates main contrib non-free deb-src http://mirrors.163.com/debian-security wheezy/updates main contrib non-free
apt-get update
做一下源更新即可。