Feisty (7.04) 版本
sudo cp /etc/apt/sources.list /etc/apt/sources.list_backup
sudo gedit /etc/apt/sources.list
deb [url]http://archive.ubuntu.com/ubuntu/[/url] feisty main restricted universe multiverse
deb [url]http://archive.ubuntu.com/ubuntu/[/url] feisty-security main restricted universe multiverse
deb [url]http://archive.ubuntu.com/ubuntu/[/url] feisty-updates main restricted universe multiverse
deb [url]http://archive.ubuntu.com/ubuntu/[/url] feisty-backports main restricted universe multiverse
deb [url]http://archive.ubuntu.com/ubuntu/[/url] feisty-proposed main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu-cn/[/url] feisty main restricted universe multiverse
这里你也可以直接使用更快速的ubuntu.cn99.com的源（推荐）:
deb [url]http://ubuntu.cn99.com/ubuntu/[/url] feisty main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu/[/url] feisty-security main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu/[/url] feisty-updates main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu/[/url] feisty-backports main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu/[/url] feisty-proposed main restricted universe multiverse
deb [url]http://ubuntu.cn99.com/ubuntu-cn/[/url] feisty main restricted universe multiverse
这里你还可以使用速度也非常快的的mirror.lupaworld.com的源:
deb [url]http://mirror.lupaworld.com/ubuntu/archive/[/url] feisty main restricted universe multiverse
deb [url]http://mirror.lupaworld.com/ubuntu/archive/[/url] feisty-security main restricted universe multiverse
deb [url]http://mirror.lupaworld.com/ubuntu/archive/[/url] feisty-updates main restricted universe multiverse
deb [url]http://mirror.lupaworld.com/ubuntu/archive/[/url] feisty-backports main restricted universe multiverse
deb [url]http://mirror.lupaworld.com/ubuntu/archive/[/url] feisty-proposed main restricted universe multiverse
deb [url]http://mirror.lupaworld.com/ubuntu/ubuntu-cn/[/url] feisty main restricted universe multiverse
如果是教育网用户请使用上海交通大学的源:
deb [url]http://ftp.sjtu.edu.cn/ubuntu/[/url] feisty main multiverse restricted universe
deb [url]http://ftp.sjtu.edu.cn/ubuntu/[/url] feisty-security main multiverse restricted universe
deb [url]http://ftp.sjtu.edu.cn/ubuntu/[/url] feisty-updates main multiverse restricted universe
deb [url]http://ftp.sjtu.edu.cn/ubuntu/[/url] feisty-backports main multiverse restricted universe
deb [url]http://ftp.sjtu.edu.cn/ubuntu/[/url] feisty-proposed main multiverse restricted universe
deb [url]http://ftp.sjtu.edu.cn/ubuntu-cn/[/url] feisty main multiverse restricted universe bleeding
上海电信的一个源:
deb [url]http://mirror.rootguide.org/ubuntu/[/url] feisty main restricted universe multiverse
deb [url]http://mirror.rootguide.org/ubuntu/[/url] feisty-proposed main restricted universe multiverse
deb [url]http://mirror.rootguide.org/ubuntu/[/url] feisty-updates main restricted universe multiverse
deb [url]http://mirror.rootguide.org/ubuntu/[/url] feisty-backports main restricted universe multiverse
deb [url]http://mirror.rootguide.org/ubuntu/[/url] feisty-security main restricted universe multiverse
deb [url]http://mirror.rootguide.org/ubuntu-cn/[/url] feisty main restricted universe multiverse
sudo apt-get update
