镜像下载

推荐使用华科的镜像：http://mirrors.hust.edu.cn/ubuntu-releases/18.04.4/

安装

大致过程可以参考这篇文章：https://ywnz.com/linuxaz/4715.html，

在选择安装方法的时候， 我采用下面这种更快的方式，如下图

apt源更换

cp /etc/apt/sources.list /etc/apt/sources.list_backup
vim /etc/apt/sources.list
# 选择合适的源，替换原文件的内容

#  阿里源
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

刷新列表

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install build-essential

参考

https://zhuanlan.zhihu.com/p/61228593