sources.list

# BYR
deb ftp://openware.byr.edu.cn/pub/mirror/ubuntu/ precise main multiverse restricted universe 
deb ftp://openware.byr.edu.cn/pub/mirror/ubuntu/ precise-backports main multiverse restricted universe 
deb ftp://openware.byr.edu.cn/pub/mirror/ubuntu/ precise-proposed main multiverse restricted universe 
deb ftp://openware.byr.edu.cn/pub/mirror/ubuntu/ precise-security main multiverse restricted universe 
deb ftp://openware.byr.edu.cn/pub/mirror/ubuntu/ precise-updates main multiverse restricted universe 

#163
deb http://mirrors.163.com/ubuntu/ precise main universe restricted multiverse 
deb-src http://mirrors.163.com/ubuntu/ precise main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/ precise-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-security universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-updates universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-updates universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ precise-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ precise-backports universe main multiverse restricted