修改Ubuntu國內鏡像

打開軟件和更新：如下圖

選擇一個自己喜歡的鏡像。

 

然后執行  sudo apt-get update    更新源。

 

結束

 

 

 

 

 

 

 

 

 

 

 

 

1、原文件備份

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

2、編輯源列表文件

sudo vim /etc/apt/sources.list

3、將原來的列表刪除，添加如下內容（中科大鏡像源）

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

4、運行sudo apt-get update