Ubuntu 10.04 教育网源
编辑Ubuntu源的方法：
#sudo gedit /etc/apt/sources.list
将文件里的内容全部删除，记得用sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak命令的方式进行备份，以备不时之需。然后将下列的内容粘贴进gedit后保存即可。
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的源，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
搜狐的源，电信教育网通用
deb http://mirrors.sohu.com/ubuntu/ lucid main restricted
deb-src http://mirrors.sohu.com/ubuntu/ lucid main restricted
deb http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted
deb-src http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted
deb http://mirrors.sohu.com/ubuntu/ lucid universe
deb-src http://mirrors.sohu.com/ubuntu/ lucid universe
deb http://mirrors.sohu.com/ubuntu/ lucid-updates universe
deb-src http://mirrors.sohu.com/ubuntu/ lucid-updates universe
deb http://mirrors.sohu.com/ubuntu/ lucid multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-updates multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-updates multiverse
保存后输入下面的指令刷新源信息：
#sudo apt-get update
然后输入：
#sudo apt-get upgrade
就可以进行系统升级了。
原文链接：http://www.ubuntuhome.com/ubuntu-10-04-yuan.html
perfect