Ubuntu16.04更换下载源（超简单）

Ubuntu16.04更换下载源

1. 备份原始文件

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

2. 编辑镜像源文件

vim /etc/apt/sources.list

3.将源文件内容全部注释，添加以下内容（更换中科大源）：

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

deb [arch=x86_64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial stable
# deb-src [arch=x86_64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial stable
deb [arch=x86_64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=x86_64] https://download.docker.com/linux/ubuntu xenial stable
deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
# deb-src [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/ xenial stable
# deb-src [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/ xenial stable

4.保存：Esc+：wq!

5.更新源

sudo apt-get update

6. 更新软件

sudo apt-get dist-upgrade
sudo apt-get upgrade