Ubuntu更改更新源

1.在终端执行以下命令：
sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup 

  （备份现有服务器列表）
sudo gedit /etc/apt/sources.list                                        （使用Gedit编辑更新源文件）

    2.复制以下网易163更新服务器，覆盖sources.list里的所有内容：
deb jaunty main restricted universe multiverse
deb jaunty-security main restricted universe multiverse
deb jaunty-updates main restricted universe multiverse
deb jaunty-proposed main restricted universe multiverse
deb jaunty-backports main restricted universe multiverse
deb-src jaunty main restricted universe multiverse
deb-src jaunty-security main restricted universe multiverse
deb-src jaunty-updates main restricted universe multiverse
deb-src jaunty-proposed main restricted universe multiverse
deb-src jaunty-backports main restricted universe multiverse
    保存！

    3.更新源列表：
sudo apt-get update

附：
1.sudo apt-get dist-upgrade #更新软件，如果对新版本软件的需求不是那么迫切，可以不执行；

2.教育网源（中国科学技术大学）：
deb hardy main restricted universe multiverse
deb hardy-backports restricted universe multiverse
deb hardy-proposed main restricted universe multiverse
deb hardy-security main restricted universe multiverse
deb hardy-updates main restricted universe multiverse
deb-src hardy main restricted universe multiverse
deb-src hardy-backports main restricted universe multiverse
deb-src hardy-proposed main restricted universe multiverse
deb-src hardy-security main restricted universe multiverse
deb-src hardy-updates main restricted universe multiverse