如何更改ubuntu的软件源

每次当我们装完ubuntu9.10的时候，紧接着要做的就是更新里面的软件和语言包，而ubuntu自带的更新源下载起来会很慢，所以我们可以更改一下更新源，以便让他下载的能快点，节省些时间。下面就来说说它的几个步骤。

首先先备份下原先的更新源文件：

在终端输入命令： sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

然后修改更新源文件：

在终端输入命令： sudo gedit /etc/apt/sources.list

把里面内容删除添加下面的源，保存退出。

一.骨头源

deb http://ubuntu.srt.cn/ubuntu/ karmic main restricted universe multiverse

deb http://ubuntu.srt.cn/ubuntu/ karmic-security main restricted universe multiverse

deb http://ubuntu.srt.cn/ubuntu/ karmic-updates main restricted universe multiverse

deb http://ubuntu.srt.cn/ubuntu/ karmic-proposed main restricted universe multiverse

deb http://ubuntu.srt.cn/ubuntu/ karmic-backports main restricted universe multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ karmic main restricted universe multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ karmic-security main restricted universe multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ karmic-updates main restricted universe multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ karmic-proposed main restricted universe multiverse

deb-src http://ubuntu.srt.cn/ubuntu/ karmic-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu karmic-security main restricted

deb-src http://security.ubuntu.com/ubuntu karmic-security main restricted

deb http://security.ubuntu.com/ubuntu karmic-security universe

deb-src http://security.ubuntu.com/ubuntu karmic-security universe

deb http://security.ubuntu.com/ubuntu karmic-security multiverse

deb-src http://security.ubuntu.com/ubuntu karmic-security multiverse

二.上海交大源

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

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

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

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

deb http://mirror.bjtu.edu.cn/ubuntu karmic-proposed main restricted universe multiverse

deb-src http://mirror.bjtu.edu.cn/ubuntu karmic main restricted universe multiverse

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

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

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

deb-src http://mirror.bjtu.edu.cn/ubuntu karmic-proposed main restricted universe multiverse