cn99更新源配置及Ubuntu系统更新指南-优快云博客

本文提供了一套cn99更新源配置方法，并指导如何使用Ubuntu进行系统更新，包括从常规更新到安全更新和推荐更新的详细步骤。

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1，常用cn99的更新源
deb http://ubuntu.cn99.com/ubuntu-cn/ edgy main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ feisty main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ feisty main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ feisty-backports main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ feisty-backports main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ feisty-proposed main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ feisty-proposed main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ feisty-security main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ feisty-security main restricted universe multiverse
deb http://ubuntu.cn99.com/ubuntu/ feisty-updates main restricted universe multiverse
deb-src http://ubuntu.cn99.com/ubuntu/ feisty-updates main restricted universe multiverse

2，修改命令
sudo gedit /etc/apt/sources.list
复制上面地址覆盖原来的内容，保存！！！！！

3，保存编辑好的文件，执行以下命令更新。
sudo apt-get update
sudo apt-get dist-upgrade