ubuntu 老版本下载

https://old-releases.ubuntu.com/releases/

UltraISO 安装原版Windows 10系统教程

https://www.sohu.com/a/478068275_121124372

乌班图双系统安装win Ubuntu20.04

https://blog.csdn.net/qq_41694024/article/details/125235869

初识 Ubuntu12.04.2 以及 Ubuntu 命令行

https://blog.csdn.net/Linux_zhicheng/article/details/104673355

ubuntu 12.04 lts 如何打开终端？？

https://zhidao.baidu.com/question/2023406032658731308.html

欢迎使用 Ubuntu 12.04 LTS

https://people.ubuntu.com/~happyaron/ubuntu-docs/precise-html/unity-introduction.html