首先，我们先换 10.04 的源：
sudo vi /etc/apt/sources.list
在打开的文档里将原 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。
如果担心失败就先将9.04的sources.list备份吧！
Ubuntu 10.04 源列表：
台湾
deb http://tw.archive.ubuntu.com/ubuntu/ lucid main universe restricted multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu/ lucid main universe restricted multiverse
deb http://tw.archive.ubuntu.com/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://tw.archive.ubuntu.com/ubuntu/ lucid-security universe main multiverse restricted
deb http://tw.archive.ubuntu.com/ubuntu/ lucid-updates universe main multiverse restricted
deb-src http://tw.archive.ubuntu.com/ubuntu/ lucid-updates universe main multiverse restricted
SRT Sources
deb http://ubuntu.srt.cn/ubuntu/ lucid main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-security main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-backports main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-security main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-updates main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-proposed main restricted universe multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-backports main restricted universe multiverse
网易（速度很快）
deb http://mirrors.163.com/ubuntu/ lucid main universe restricted multiverse
deb-src http://mirrors.163.com/ubuntu/ lucid main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ lucid-security universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ lucid-updates universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ lucid-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ lucid-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/ lucid-updates universe main multiverse restricted
ubuntu 官方上海源，提供 Kernel ， Hiweed ， ubuntu
deb http://mirror.rootguide.org/ubuntu/ lucid main universe restricted multiverse
deb-src http://mirror.rootguide.org/ubuntu/ lucid main universe restricted multiverse
deb http://mirror.rootguide.org/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-security universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-updates universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb http://mirror.rootguide.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirror.rootguide.org/ubuntu/ lucid-updates universe main multiverse restricted
搜狐
deb http://mirrors.shlug.org/ubuntu/ lucid main universe restricted multiverse
deb-src http://mirrors.shlug.org/ubuntu/ lucid main universe restricted multiverse
deb http://mirrors.shlug.org/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://mirrors.shlug.org/ubuntu/ lucid-security universe main multiverse restricted
deb http://mirrors.shlug.org/ubuntu/ lucid-updates universe main multiverse restricted
deb http://mirrors.shlug.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb-src http://mirrors.shlug.org/ubuntu/ lucid-proposed universe main multiverse restricted
deb http://mirrors.shlug.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://mirrors.shlug.org/ubuntu/ lucid-updates universe main multiverse restricted
骨头源，骨头源是 bones7456 架设的一个 Ubuntu 源 ，提供 ubuntu,deepin
deb http://ubuntu.srt.cn/ubuntu/ lucid main universe restricted multiverse
deb-src http://ubuntu.srt.cn/ubuntu/ lucid main universe restricted multiverse
deb http://ubuntu.srt.cn/ubuntu/ lucid-security universe main multiverse restricted
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-security universe main multiverse restricted
deb http://ubuntu.srt.cn/ubuntu/ lucid-updates universe main multiverse restricted
deb http://ubuntu.srt.cn/ubuntu/ lucid-proposed universe main multiverse restricted
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-proposed universe main multiverse restricted
deb http://ubuntu.srt.cn/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-backports universe main multiverse restricted
deb-src http://ubuntu.srt.cn/ubuntu/ lucid-updates universe main multiverse restricted
然后我们更新源信息：
sudo apt-get update
接着我们开始升级：
sudo apt-get upgrade
完了后重启OK!
我选择的是网易的升级了6台服务器全部成功！