Ubuntu 14.04 binary-armhf源

这个源是中科大的源，国内速度还不错。

切换源，需要修改/etc/apt/sources.list文件，记得做好备份哦~

deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-backports main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-proposed main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-security main multiverse restricted universe
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-updates main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-backports main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-proposed main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-security main multiverse restricted universe
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ trusty-updates main multiverse restricted universe

另外还可以使用其他几个源：

台湾新北：http://ftp.ubuntu-tw.org/mirror/ubuntu-ports/

滑铁卢大学：http://mirror.csclub.uwaterloo.ca/ubuntu-ports/

麻省理工：http://mirrors.mit.edu/ubuntu-ports/