1 备份系统配置

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

2 编辑配置

sudo vi /etc/apt/sources.list

修改内容如下

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

 

修改完保存，进行更新

sudo apt-get update