香港 ubuntu apt 源

香港中文大学的源，效果不错。

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