ubuntu 9.10 更新源

1.修改前记得先备份
sudo cp /etc/apt/sources.list /etc/apt/sources.list_bak

2.然后修改源配置文件
sudo gedit /etc/apt/sources.list
编辑你的源列表，将原来的内容全部删除，添加下面列表中最适合你的源（注意不要全部添加），选择一个最合适你的即可，复制到你的列表中，然后保存列表。

3.改完了记得
sudo aptitude update #更新源列表信息
sudo aptitude upgrade #更新系统

4.Ubuntu 9.10源列表：

台湾
deb http://tw.archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb http://tw.archive.ubuntu.com/ubuntu/ karmic-updates universe main multiverse restricted
deb http://tw.archive.ubuntu.com/ubuntu/ karmic-proposed universe main multiverse restricted
deb http://tw.archive.ubuntu.com/ubuntu/ karmic-security universe main multiverse restricted
deb http://tw.archive.ubuntu.com/ubuntu/ karmic-backports main multiverse restricted universe
deb-src http://tw.archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu/ karmic-security universe main multiverse restricted
deb-src http://tw.archive.ubuntu.com/ubuntu/ karmic-updates universe main multiverse restricted
deb-src http://tw.archive.ubuntu.com/ubuntu/ karmic-proposed universe main multiverse restricted
deb-src http://tw.archive.ubuntu.com/ubuntu/ karmic-backports universe main multiverse restricted

北京交通大学
deb http://mirror.bjtu.edu.cn/ubuntu/ karmic main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ karmic-backports main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ karmic-proposed main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ karmic-security main multiverse restricted universe
deb http://mirror.bjtu.edu.cn/ubuntu/ karmic-updates main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ karmic main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ karmic-backports main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ karmic-proposed main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ karmic-security main multiverse restricted universe
deb-src http://mirror.bjtu.edu.cn/ubuntu/ karmic-updates main multiverse restricted universe

马来西亚
deb http://archive.mmu.edu.my/ubuntu/ karmic main restricted universe multiverse
deb http://archive.mmu.edu.my/ubuntu/ karmic-security main restricted universe multiverse
deb http://archive.mmu.edu.my/ubuntu/ karmic-updates main restricted universe multiverse
deb http://archive.mmu.edu.my/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://archive.mmu.edu.my/ubuntu/ karmic-backports main restricted universe multiverse
deb-src http://archive.mmu.edu.my/ubuntu/ karmic main restricted universe multiverse
deb-src http://archive.mmu.edu.my/ubuntu/ karmic-security main restricted universe multiverse
deb-src http://archive.mmu.edu.my/ubuntu/ karmic-updates main restricted universe multiverse
deb-src http://archive.mmu.edu.my/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://archive.mmu.edu.my/ubuntu/ karmic-backports main restricted universe multiverse

江苏双线
deb http://mirror.lupaworld.com/ubuntu karmic main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu karmic-security main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu karmic-updates main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu karmic-backports main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/ubuntu-cn karmic main restricted universe multiverse
deb http://mirror.lupaworld.com/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu karmic main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu karmic-security main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu karmic-updates main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu karmic-backports main restricted universe multiverse
deb-src http://mirror.lupaworld.com/ubuntu/ karmic-proposed main restricted universe multiverse

日本
deb http://jp.archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb http://security.ubuntu.com/ubuntu/ karmic-security universe main multiverse restricted
deb http://jp.archive.ubuntu.com/ubuntu/ karmic-updates universe main multiverse restricted
deb http://jp.archive.ubuntu.com/ubuntu/ karmic-proposed universe main multiverse restricted
deb-src http://jp.archive.ubuntu.com/ubuntu/ karmic main universe restricted multiverse
deb-src http://jp.archive.ubuntu.com/ubuntu/ karmic-proposed universe main multiverse restricted
deb-src http://jp.archive.ubuntu.com/ubuntu/ karmic-security universe main multiverse restricted
deb-src http://jp.archive.ubuntu.com/ubuntu/ karmic-updates universe main multiverse restricted

以上为源列表，其中"karmic"为ubuntu 9.10 的开发代号。

相关源文本文件下载：
台湾源文件
http://bbs.sq01.cn/attachments/month_1002/karmic_tw.txt