apt-get instal Reading package lists... Done Building dependency tree 問題

今天遇見在docker，新建一個容器遇見了這樣一個問題。下載nginx 的時候，
root@114e9c6168c0:/# apt-get install -y nginx
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package nginx

問題：為什么會 Unable to locate package nginx

回答：apt-get 源里面沒有nginx 包

解決辦法 1、apt-get update 更新本地源

解決辦法 2、更新源

1、原文件重命名備份
sudo mv /etc/apt/sources.list /etc/apt/source.list.bak 
2、編輯源列表文件
sudo vim /etc/apt/sources.list
3、復制

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

4、更新
sudo apt-get update
sudo apt-get upgrade

解決！！！！