配置：

用安装时设置的用户名密码进入系统

现在还不能用管理员登录

如果你不想每次执行命令时在前面加sudo然后再输入密码的话，建议你每次用管理员登录

设置方法是 系统－系统管理－登录窗口－安全－允许本地系统管理员登录

然后在 系统－系统管理－用户和组里面设置root的密码

以后登录的用户名就是root了

配置pppoeconf

打开终端，如果是普通用户输入sudo pppoeconf

root用户可直接输入pppoeconf

设置的时候一路回车

只在输入用户名密码的时候设置自己的宽带用户名密码

用路由器的用户可以不进行pppoeconf设置直接上网

设置源

应用程序－附件－终端

sudo gedit /etc/apt/sources.list

这里仅提供几个常用源和教育网源

用以下内容替换文件中的所有内容

#archive

deb http://archive.ubuntu.com/ubuntu/ feisty main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ feisty-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ feisty-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ feisty-backports main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ feisty-proposed main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu-cn/ feisty main restricted universe multiverse

#cn99

deb http://ubuntu.cn99.com/ubuntu/ feisty main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ feisty-security main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ feisty-updates main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ feisty-backports main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ feisty-proposed main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu-cn/ feisty main restricted universe multiverse

#lupa

deb http://mirror.lupaworld.com/ubuntu/archive/ feisty main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ feisty-security main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ feisty-updates main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ feisty-backports main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/archive/ feisty-proposed main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu/ubuntu-cn/ feisty main restricted universe multiverse

#中国科技大学

deb http://debian.ustc.edu.cn/ubuntu/ feisty main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ feisty-backports restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ feisty-proposed main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ feisty-security main restricted universe multiverse

deb http://debian.ustc.edu.cn/ubuntu/ feisty-updates main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ feisty main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ feisty-backports main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ feisty-proposed main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ feisty-security main restricted universe multiverse

deb-src http://debian.ustc.edu.cn/ubuntu/ feisty-updates main restricted universe multiverse

#北京交大

deb http://mirror.bjtu.edu.cn/ubuntu/ feisty main restricted universe multiverse

deb http://mirror.bjtu.edu.cn/ubuntu/ feisty-updates main restricted universe multiverse

deb http://mirror.bjtu.edu.cn/ubuntu/ feisty-security main restricted universe multiverse

deb http://mirror.bjtu.edu.cn/ubuntu/ feisty-backports main restricted universe multiverse

sudo apt-get update

sudo apt-get dist-upgrade

#上海交通大学

deb http://ftp.sjtu.edu.cn/ubuntu/ feisty main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ feisty-backports main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ feisty-proposed main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ feisty-security main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu/ feisty-updates main multiverse restricted universe

deb http://ftp.sjtu.edu.cn/ubuntu-cn/ feisty main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ feisty main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ feisty-backports main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ feisty-proposed main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ feisty-security main multiverse restricted universe

deb-src http://ftp.sjtu.edu.cn/ubuntu/ feisty-updates main multiverse restricted universe

#清华大学

deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ feisty main restricted universe multiverse

deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ feisty-security main restricted universe multiverse

deb ftp://ftp3.tsinghua.edu.cn/mirror/ubuntu/ubuntu/ feisty-updates main restricted universe multiverse

#兰州大学

deb ftp://mirror.lzu.edu.cn/ubuntu/ feisty main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ feisty-backports main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ feisty-proposed main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ feisty-security main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu/ feisty-updates main multiverse restricted universe

deb ftp://mirror.lzu.edu.cn/ubuntu-cn/ feisty main multiverse restricted universe

#台湾大学

deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty main restricted universe multiverse

deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty main restricted universe multiverse

deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-updates main restricted universe multiverse

deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-updates main restricted universe multiverse

deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-backports main restricted universe multiverse

deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-backports main restricted universe multiverse

deb http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-security main restricted universe multiverse

deb-src http://ubuntu.csie.ntu.edu.tw/ubuntu/ feisty-security main restricted universe multiverse

只用选择一个源替换就行