在ubuntu安装nginx的时候失败报错，解决方案

更换软件源：https://www.cnblogs.com/flyinggod/p/7979108.html

1. 备份

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak 

2.修改

sudo vim /etc/apt/sources.list

将source.list文件内容替换成下面的（网易163的 软件源）

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

3. 更新

sudo apt-get update

4.重新的下载安装。