提供可用的BT5更新源，亲测可用

现在已经从BT5到kali了，原来的BT5的软件源有些已经跟不上了。所以应该修改BT5下的软件源：/etc/apt/sources.list

kali国内源的地址：

deb http://ftp.sjtu.edu.cn/debian wheezy main non-free contribdeb-src http://ftp.sjtu.edu.cn/debian wheezy main non-free contribdeb http://ftp.sjtu.edu.cn/debian wheezy-proposed-updates main non-free contribdeb-src http://ftp.sjtu.edu.cn/debian wheezy-proposed-updates main non-free contribdeb http://ftp.sjtu.edu.cn/debian-security wheezy/updates main non-free contribdeb-src http://ftp.sjtu.edu.cn/debian-security wheezy/updates main non-free contribdeb http://mirrors.163.com/debian wheezy main non-free contribdeb-src http://mirrors.163.com/debian wheezy main non-free contribdeb http://mirrors.163.com/debian wheezy-proposed-updates main non-free contribdeb-src http://mirrors.163.com/debian wheezy-proposed-updates main non-free contribdeb-src http://mirrors.163.com/debian-security wheezy/updates main non-free contribdeb http://mirrors.163.com/debian-security wheezy/updates main non-free contrib

下面是截图：

apt-get update GPG error ：

apt-key adv --keyserver pgp.mit.edu --recv-keys 公钥（下图NO_PUBKEY后面的字符）