Ubuntu更新源切换为香港中文大学
1、更新源nano /etc/apt/sources.list在sources.list中加入以下代码：
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty main restricted universe multiverse deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-security main restricted universe multiverse deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-updates main restricted universe multiverse deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-proposed main restricted universe multiverse deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty main restricted universe multiverse deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-security main restricted universe multiverse deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-proposed main restricted universe multiverse deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ trusty-backports main restricted universe multiverse
