http://wiki.ubuntu.org.cn/Qref/Source
某同学常用list
deb http://mirrors.sohu.com/ubuntu/ lucid main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-security main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ lucid-backports main restricted universe multiverse
for server sources list
deb http://archive.ubuntu.com/ubuntu lucid main
deb http://security.ubuntu.com/ubuntu lucid-security main
deb http://archive.ubuntu.com/ubuntu/ lucid main restricted
deb http://archive.ubuntu.com/ubuntu/ lucid-security main restricted
deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted
deb http://archive.ubuntu.com/ubuntu/ lucid-proposed main restricted
deb http://archive.ubuntu.com/ubuntu/ lucid-backports main restricted
deb http://ppa.launchpad.net/jdub/devel/ubuntu maverick main
deb http://ppa.launchpad.net/brianmercer/php/ubuntu lucid main
deb-src http://ppa.launchpad.net/brianmercer/php/ubuntu lucid main
deb http://cn.archive.ubuntu.com/ubuntu/ lucid main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid main restricted
deb http://cn.archive.ubuntu.com/ubuntu/ lucid-updates main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ lucid-updates main restricted