目前本人所使用的源,完整性好，推荐使用。
终端命令
修改源：sudo gedit /etc/apt/sources.list
更新源：sudo apt-get update
升级源：sudo apt-get upgrade
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
CN99
deb http://ubuntu.cn99.com/ubuntu/ karmic main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ karmic-backports restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ karmic-security main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ karmic-updates main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ karmic main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ karmic-backports main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ karmic-security main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ karmic-updates main restricted universe multiverse
网易
deb http://mirrors.163.com/ubuntu/ karmic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ karmic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ karmic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ karmic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ karmic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ karmic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ karmic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ karmic-backports main restricted universe multiverse
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
电子科技大学
deb http://ubuntu.uestc.edu.cn/ubuntu/ karmic main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ karmic-backports main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ karmic-security main restricted universe multiverse
deb http://ubuntu.uestc.edu.cn/ubuntu/ karmic-updates main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ karmic main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ karmic-backports main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ karmic-security main restricted universe multiverse
deb-src http://ubuntu.uestc.edu.cn/ubuntu/ karmic-updates main restricted universe multiverse
搜狐源
deb http://mirrors.sohu.com/ubuntu/ karmic main restricted
deb-src http://mirrors.sohu.com/ubuntu/ karmic main restricted
deb http://mirrors.sohu.com/ubuntu/ karmic-updates main restricted
deb-src http://mirrors.sohu.com/ubuntu/ karmic-updates main restricted
deb http://mirrors.sohu.com/ubuntu/ karmic universe
deb-src http://mirrors.sohu.com/ubuntu/ karmic universe
deb http://mirrors.sohu.com/ubuntu/ karmic-updates universe
deb-src http://mirrors.sohu.com/ubuntu/ karmic-updates universe
deb http://mirrors.sohu.com/ubuntu/ karmic multiverse
deb-src http://mirrors.sohu.com/ubuntu/ karmic multiverse
deb http://mirrors.sohu.com/ubuntu/ karmic-updates multiverse
deb-src http://mirrors.sohu.com/ubuntu/ karmic-updates multiverse
国立交通大学
deb http://debian.nctu.edu.tw/ubuntu/ karmic main restricted universe multiverse
deb http://debian.nctu.edu.tw/ubuntu/ karmic-security main restricted universe multiverse
deb http://debian.nctu.edu.tw/ubuntu/ karmic-updates main restricted universe multiverse
deb http://debian.nctu.edu.tw/ubuntu/ karmic-proposed main restricted universe multiverse
deb http://debian.nctu.edu.tw/ubuntu/ karmic-backports main restricted universe multiverse
deb-src http://debian.nctu.edu.tw/ubuntu/ karmic main restricted universe multiverse
deb-src http://debian.nctu.edu.tw/ubuntu/ karmic-security main restricted universe multiverse
deb-src http://debian.nctu.edu.tw/ubuntu/ karmic-updates main restricted universe multiverse
deb-src http://debian.nctu.edu.tw/ubuntu/ karmic-proposed main restricted universe multiverse
deb-src http://debian.nctu.edu.tw/ubuntu/ karmic-backports main restricted universe multiverse