wsl2 安裝后用 wifi 共享是能聯網，問題出在公司網絡限制 wsl2 IP 訪問網絡，但是主機可以上網。

解決辦法，在主機用 nginx 設置代理，可能需要開端口權限

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

/etc/apt/sources.list

# 阿里源鏡像地址
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