wsl2 安装后用 wifi 共享是能联网，问题出在公司网络限制 wsl2 IP 访问网络，但是主机可以上网。

解决办法，在主机用 nginx 设置代理，可能需要开端口权限

server {listen       9000;server_name  localhost;location /ubuntu/ {# 阿里源镜像地址proxy_pass https://mirrors.aliyun.com/ubuntu/; # 前端地址和端口}}

/etc/apt/sources.list

# 阿里源镜像地址
deb http://192.168.5.116:9000/ubuntu/ focal main restricted universe multiverse
deb http://192.168.5.116:9000/ubuntu/ focal-security main restricted universe multiverse
deb http://192.168.5.116:9000/ubuntu/ focal-updates main restricted universe multiverse
deb http://192.168.5.116:9000/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://192.168.5.116:9000/ubuntu/ focal main restricted universe multiverse
deb-src http://192.168.5.116:9000/ubuntu/ focal-security main restricted universe multiverse
deb-src http://192.168.5.116:9000/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://192.168.5.116:9000/ubuntu/ focal-backports main restricted universe multiverse

sudo apt update

酸爽