修改Ubuntu国内镜像

打开软件和更新：以下图

选择一个本身喜欢的镜像。

 

而后执行  sudo apt-get update    更新源。

 

结束

 

 

 

 

 

 

 

 

 

 

 

 

一、原文件备份

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

二、编辑源列表文件

sudo vim /etc/apt/sources.list

三、将原来的列表删除，添加以下内容（中科大镜像源）

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

四、运行sudo apt-get update