安装官方文档
https://docs.microsoft.com/zh-cn/windows/wsl/install-win10#update-to-wsl-2
注意:WSL Ubuntu镜像为最小化安装，比完整版缺失的，需要手动安装
更换镜像源
确认安装的系统版本
lsb_release -a
阿里源
http://mirrors.aliyun.com/ubuntu/
模版 更换TODO为系统版本
deb http://mirrors.aliyun.com/ubuntu/ TODO main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ TODO main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ TODO-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ TODO-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ TODO-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ TODO-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ TODO-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ TODO-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ TODO-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ TODO-backports main restricted universe multiverse
20.04的配置
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
更新
#备份
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
#编辑，粘贴上面的配置
sudo vim /etc/apt/sources.list
sudo apt-get update
sudo apt-get upgrade
备份Ubuntu
wsl --export Ubuntu D:\WSL\Ubuntu_back.tar
wsl --unregister Ubuntu
wsl --import Ubuntu D:\WSL\Ubuntu D:\WSL\Ubuntu_back.tar
