Ubuntu18.04安装大概简要回顾

前期准备

1. U盘制作启动项
2. 将bios改成uefi启动，硬盘改成GPT（便于分多个主分区）

安装分区

1. 均为主分区（对于是否保留boot分区，暂未查明确定说法）
2. 另安装时将整块硬盘均安装为ubuntu，不涉及双系统
   
   

安装系统后附加

1. 将“软件和更新”中Ubuntu软件下载至改成aliyun
2. 换成国内最快的阿里云源
   备份原来的源文件
   sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
   替换源
   sudo gedit /etc/apt/sources.list

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

更新源和软件

sudo apt-get update
sudo apt-get upgrade