绑定子域名到不同目录（子站）
网站的目录结构为 /var/www/html:
├── fx
└── blog
└── photo
html为nginx的默认网站目录。
sudo vi /etc/nginx/sites-available/default
关键代码就两行见红色字体：
server {
listen default_server;
listen [::]: default_server;
server_name mongotree.top ~^(?<subdomain>.+)\.mongotree\.top$;
root /var/www/html/$subdomain;
# Add index.php to the list if you are using PHP
index index.html index.htm index.nginx-debian.html;
location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a .
try_files $uri $uri/ =;
}
}
sudo /etc/init.d/nginx restart
域名解析配置，子域名解析到主站相同IP就行。
如主站IP是1.1.1.1，添加A记录fx解析到主站IP 1.1.1.1就行。