制作Ubuntu20.04系统盘_wp猿的博客-CSDN博客_做ubuntu系统盘
https://blog.csdn.net/weixin_52045738/article/details/121902923U盘如何安装Ubuntu系统？乌班图Ubuntu20.04桌面版安装教程_装机教程-装机之家 (lotpc.com)http://www.lotpc.com/zjjc/9382.html
?制作Ubuntu 20.04LTS U盘启动盘时，将U盘格式化成fat格式后，再用Ultraso工具烧录U盘后，装双系统时会报错：
安装程序向硬盘复制文件时遇到错误：[Errno 5] input/output error，大致意思是从U盘拷贝东西时发生错误；
初步分析原因还是启动盘出问题，最终多次尝试将U盘格式化NTFS，再用Ultraso工具烧录U盘后，最终安装双系统成功。
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2022.5.6更新：
ubuntu 20.04 配套源：
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
