问题背景
我是先安装了 Windows10 子系统 WSL
wsl --install
并安装Ubuntu20.04
wsl --install -d Ubuntu20.04
在此基础上安装ROS，参考详细介绍如何在ubuntu20.04中安装ROS系统
问题描述
在安装ROS的这一步
sudo apt-get install ros-noetic-desktop-full
出现了报错：“Unable to fetch some archives, maybe run apt-get update or try with --fix-missing”
解决方案
经过一番搜索，确定是镜像源的问题，按照这篇文章的思路，进入sources.list文件
sudo vim /etc/apt/sources.list
不同版本的源不一样，由于我的Ubuntu版本是20.04，所以将内容替换为(替换的依据为Ubuntu 镜像)
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src 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-backports main restricted universe multiverse
然后sudo apt-get update
再执行sudo apt-get install ros-noetic-desktop-full，
即可解决“Unable to fetch some archives, maybe run apt-get update or try with --fix-missing”的问题。
参考链接
[1] 详细介绍如何在ubuntu20.04中安装ROS系统
[2] Ubuntu16.04解决Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
[3] Ubuntu 镜像
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