deb http://mirrors.163.com/ubuntu/ quantal main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal -security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal -updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal -proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ quantal -backports main restricted universe multiverse deb -src http://mirrors.163.com/ubuntu/ quantal main restricted universe multiverse deb -src http://mirrors.163.com/ubuntu/ quantal -security main restricted universe multiverse deb -src http://mirrors.163.com/ubuntu/ quantal -updates main restricted universe multiverse deb -src http://mirrors.163.com/ubuntu/ quantal -proposed main restricted universe multiverse deb -src http://mirrors.163.com/ubuntu/ quantal -backports main restricted universe multiverse 自从11.04更新源不再维护，更新就比较麻烦，这个源相比来说还是蛮快的，在次记录下，一方便以后使用