图解ubuntu8.10升级到9.04(源列表)

    第一条命令
    sudo gedit /etc/apt/sources.list
    编辑你的源列表，添加下面列表中你觉得适合你的，复制到你的列表中，然后保存列表。
    Archive.ubuntu.com更新服务器（欧洲，此为官方源，电信网通用户使用)：

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

    网易163更新服务器：

    deb http://mirrors.163.com/ubuntu/ jaunty main restricted universe multiverse
    deb http://mirrors.163.com/ubuntu/ jaunty-security main restricted universe multiverse
    deb http://mirrors.163.com/ubuntu/ jaunty-updates main restricted universe multiverse
    deb http://mirrors.163.com/ubuntu/ jaunty-proposed main restricted universe multiverse
    deb http://mirrors.163.com/ubuntu/ jaunty-backports main restricted universe multiverse
    deb-src http://mirrors.163.com/ubuntu/ jaunty main restricted universe multiverse
    deb-src http://mirrors.163.com/ubuntu/ jaunty-security main restricted universe multiverse
    deb-src http://mirrors.163.com/ubuntu/ jaunty-updates main restricted universe multiverse
    deb-src http://mirrors.163.com/ubuntu/ jaunty-proposed main restricted universe multiverse
    deb-src http://mirrors.163.com/ubuntu/ jaunty-backports main restricted universe multiverse

    Mirrors.shlug.org更新服务器（电信服务器，Ubuntu China Official Mirror, maintained by Shanghai Linux User Group）：

    deb http://cn.archive.ubuntu.com/ubuntu jaunty main restricted universe multiverse
    deb http://cn.archive.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
    deb http://cn.archive.ubuntu.com/ubuntu jaunty-updates main restricted universe multiverse
    deb http://cn.archive.ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
    deb http://cn.archive.ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse
    deb-src http://cn.archive.ubuntu.com/ubuntu jaunty main restricted universe multiverse
    deb-src http://cn.archive.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
    deb-src http://cn.archive.ubuntu.com/ubuntu jaunty-updates main restricted universe multiverse
    deb-src http://cn.archive.ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
    deb-src http://cn.archive.ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse

    Mirror.lupaworld.com更新服务器（浙江省杭州市双线服务器，推荐）：

    deb http://mirror.lupaworld.com/ubuntu jaunty main restricted universe multiverse
    deb http://mirror.lupaworld.com/ubuntu jaunty-security main restricted universe multiverse
    deb http://mirror.lupaworld.com/ubuntu jaunty-updates main restricted universe multiverse
    deb http://mirror.lupaworld.com/ubuntu jaunty-backports main restricted universe multiverse
    deb http://mirror.lupaworld.com/ubuntu jaunty-proposed main restricted universe multiverse
    deb-src http://mirror.lupaworld.com/ubuntu jaunty main restricted universe multiverse
    deb-src http://mirror.lupaworld.com/ubuntu jaunty-security main restricted universe multiverse
    deb-src http://mirror.lupaworld.com/ubuntu jaunty-updates main restricted universe multiverse
    deb-src http://mirror.lupaworld.com/ubuntu jaunty-backports main restricted universe multiverse
    deb-src http://mirror.lupaworld.com/ubuntu jaunty-proposed main restricted universe multiverse

    厦门大学更新服务器（教育网服务器）：

    deb ftp://ubuntu.realss.cn/ubuntu/ jaunty main restricted universe multiverse
    deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-backports restricted universe multiverse
    deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
    deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-security main restricted universe multiverse
    deb ftp://ubuntu.realss.cn/ubuntu/ jaunty-updates main restricted universe multiverse
    deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty main restricted universe multiverse
    deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-backports main restricted universe multiverse
    deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-proposed main restricted universe multiverse
    deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-security main restricted universe multiverse
    deb-src ftp://ubuntu.realss.cn/ubuntu/ jaunty-updates main restricted universe multiverse

    成都市 电子科技大学更新服务器（教育网，推荐校园网和网通用户使用）：

    deb http://ubuntu.uestc.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe
    deb-src http://ubuntu.uestc.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb-src http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb-src http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb-src http://ubuntu.uestc.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe

    == 如果无法解析uestc.edu.cn域名，请使用以下地址 ==

    deb http://ubuntu.dormforce.net/ubuntu/ jaunty main multiverse restricted universe
    deb http://ubuntu.dormforce.net/ubuntu/ jaunty-backports main multiverse restricted universe
    deb http://ubuntu.dormforce.net/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb http://ubuntu.dormforce.net/ubuntu/ jaunty-security main multiverse restricted universe
    deb http://ubuntu.dormforce.net/ubuntu/ jaunty-updates main multiverse restricted universe
    deb-src http://ubuntu.dormforce.net/ubuntu/ jaunty main multiverse restricted universe
    deb-src http://ubuntu.dormforce.net/ubuntu/ jaunty-backports main multiverse restricted universe
    deb-src http://ubuntu.dormforce.net/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://ubuntu.dormforce.net/ubuntu/ jaunty-security main multiverse restricted universe
    deb-src http://ubuntu.dormforce.net/ubuntu/ jaunty-updates main multiverse restricted universe

    上海市上海交通大学更新服务器（教育网，推荐校园网和网通用户使用）：

    deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb http://ftp.sjtu.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe
    deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb-src http://ftp.sjtu.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe

    中国科学技术大学更新服务器（教育网，推荐校园网和网通用户使用）：

    deb http://debian.ustc.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb http://debian.ustc.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb http://debian.ustc.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb http://debian.ustc.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb http://debian.ustc.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe
    deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty main multiverse restricted universe
    deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-backports main multiverse restricted universe
    deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-security main multiverse restricted universe
    deb-src http://debian.ustc.edu.cn/ubuntu/ jaunty-updates main multiverse restricted universe

    中国台湾 台湾大学更新服务器（推荐网通用户使用，电信PING平均响应速度41MS。强烈推荐此源，比较完整，较少出现同步问题）：

    deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty main restricted universe multiverse
    deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty main restricted universe multiverse
    deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-updates main restricted universe multiverse
    deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-updates main restricted universe multiverse
    deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-backports main restricted universe multiverse
    deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-backports main restricted universe multiverse
    deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-security main restricted universe multiverse
    deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-security main restricted universe multiverse
    deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ jaunty-proposed main restricted universe multiverse

    mirror.rootguide.org更新服务器（上海市 电信）：

    deb http://mirror.rootguide.org/ubuntu/ jaunty main restricted universe multiverse
    deb-src http://mirror.rootguide.org/ubuntu/ jaunty main restricted universe multiverse
    deb http://mirror.rootguide.org/ubuntu/ jaunty-updates main restricted universe multiverse
    deb-src http://mirror.rootguide.org/ubuntu/ jaunty-updates main restricted universe multiverse
    deb http://mirror.rootguide.org/ubuntu/ jaunty-backports main restricted universe multiverse
    deb-src http://mirror.rootguide.org/ubuntu/ jaunty-backports main restricted universe multiverse
    deb http://mirror.rootguide.org/ubuntu/ jaunty-security main restricted universe multiverse
    deb-src http://mirror.rootguide.org/ubuntu/ jaunty-security main restricted universe multiverse
    deb http://mirror.rootguide.org/ubuntu/ jaunty-proposed main multiverse restricted universe
    deb-src http://mirror.rootguide.org/ubuntu/ jaunty-proposed main restricted universe multiverse

    台湾的官方源速度也相当不错，有时甚至快于内地的：

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

    第二条命令
    sudo apt-get update
    更新源列表信息

    第三条命令
    sudo update-manager -d
    运行更新管理器，你会看到下图，点击升级

    发行版升级

    此后就是漫长的等待，选择好的源很重要，会节省很多下载的时间，下载完后配置新的系统，重启系统，就是9.04了。
    如果你迫不及待想体验的话，那就按照本文开始吧！Just do it!
    享受开源，享受ubuntu！