修改ubuntu14.10的镜像源

1. 修改文件

gedit /etc/apt/source.list

2. 镜像源列表

2.1 清华源（优先推荐）

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-proposed main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main multiverse restricted universe

2.2 163源

deb http://mirrors.163.com/ubuntu/ vivid main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ vivid-security main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ vivid-updates main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ vivid-proposed main restricted universe multiversedeb http://mirrors.163.com/ubuntu/ vivid-backports main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ vivid main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ vivid-security main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ vivid-updates main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ vivid-proposed main restricted universe multiversedeb-src http://mirrors.163.com/ubuntu/ vivid-backports main restricted universe multiverse

2.3 sohu源

deb http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiversedeb http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiversedeb http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiversedeb http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb-src http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

2.4 ubuntu

deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

2. 最后

update软件列表

apt-get update

3. 最后的最后

假如你遇到，更新了源之后，虽然update很快，但是真正install软件的时候，相互依赖的软件不能被一起下载安装，老是提示TMD的什么什么软件版本不够，什么什么软件没被安装。
只能说明，这个源不好使。多半是废了。
再切换源吧！

当然，ubuntu的源固然好啊，只是还得翻墙搞vpn等等。。。唉 不说了