我的nginx.conf配置如下 http { include /etc/nginx/mime.types; default_type application/octet-stream; include /etc/nginx/conf.d/*.conf; server { listen 8081; server_name localhost; location / { root /usr/share/nginx/www; index index.html; } location /main { root /usr/share/nginx/www; index i.html; } } } server监听的是8081端口,然而当访问localhost:8081/main时,nginx并不能导航到对应的页面,而是报404错,请问这是什么原因呢? 【www路径下有2个html文件:index.html和i.html】