PS：自己留一份以备不时之需。
成都电子科大的源，教育网推荐deb http://Ubuntu.uestc.edu.cn/ubuntu/ lucid main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-backports main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-security main restricted universe multiverse
deb http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ lucid main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://Ubuntu.uestc.edu.cn/ubuntu/ lucid-updates main restricted universe multiverse
中科大的源，教育网推荐deb http://debian.ustc.edu.cn/Ubuntu/ lucid main restricted universe multiverse
deb http://debian.ustc.edu.cn/Ubuntu/ lucid-backports restricted universe multiverse
deb http://debian.ustc.edu.cn/Ubuntu/ lucid-proposed main restricted universe multiverse
deb http://debian.ustc.edu.cn/Ubuntu/ lucid-security main restricted universe multiverse
deb http://debian.ustc.edu.cn/Ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/Ubuntu/ lucid main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/Ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/Ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/Ubuntu/ lucid-security main restricted universe multiverse
deb-src http://debian.ustc.edu.cn/Ubuntu/ lucid-updates main restricted universe multiverse
北京交大的源，教育网deb http://mirror.bjtu.edu.cn/Ubuntu/ lucid main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/Ubuntu/ lucid-backports main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/Ubuntu/ lucid-proposed main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/Ubuntu/ lucid-security main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/Ubuntu/ lucid-updates main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ lucid main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ lucid-backports main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ lucid-proposed main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ lucid-security main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/Ubuntu/ lucid-updates main multiverse restricted universe
兰州大学的源，教育网deb ftp://mirror.lzu.edu.cn/Ubuntu/ lucid main multiverse restricted universe
deb ftp://mirror.lzu.edu.cn/Ubuntu/ lucid-backports main multiverse restricted universe
deb ftp://mirror.lzu.edu.cn/Ubuntu/ lucid-proposed main multiverse restricted universe
deb ftp://mirror.lzu.edu.cn/Ubuntu/ lucid-security main multiverse restricted universe
deb ftp://mirror.lzu.edu.cn/Ubuntu/ lucid-updates main multiverse restricted universe
deb ftp://mirror.lzu.edu.cn/Ubuntu-cn/ lucid main multiverse restricted universe
上海交大的源deb http://ftp.sjtu.edu.cn/Ubuntu/ lucid main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/Ubuntu/ lucid-backports main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/Ubuntu/ lucid-proposed main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/Ubuntu/ lucid-security main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/Ubuntu/ lucid-updates main multiverse restricted universe
deb http://ftp.sjtu.edu.cn/Ubuntu-cn/ lucid main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/Ubuntu/ lucid main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/Ubuntu/ lucid-backports main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/Ubuntu/ lucid-proposed main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/Ubuntu/ lucid-security main multiverse restricted universe
deb-src http://ftp.sjtu.edu.cn/Ubuntu/ lucid-updates main multiverse restricted universe
163的，电信教育网通用deb http://mirrors.163.com/Ubuntu/ lucid main restricted universe multiverse
deb http://mirrors.163.com/Ubuntu/ lucid-security main restricted universe multiverse
deb http://mirrors.163.com/Ubuntu/ lucid-updates main restricted universe multiverse
deb http://mirrors.163.com/Ubuntu/ lucid-proposed main restricted universe multiverse
deb http://mirrors.163.com/Ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ lucid main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ lucid-security main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/Ubuntu/ lucid-backports main restricted universe multiverse