nginx ---- virtual host configuration

---- Nginx virtual host configuration
simplify the configuration
    HTTP {
        Server {
        the listen defalut 80;
        server_name _ *;
        access_log logs / main default.access.log;
        LOCATION / {
            index index.html;
            the root / var / WWW / default / the htdocs;
        }
       }
    }

two or more virtual hosts
    HTTP {
        Server {
        the listen 80;
        server_name www.test1.com;
        access_log logs / main test1.access.log;
        LOCATION / {
            index index.html;
            the root / var / WWW / test1. COM / the htdocs;
        }
        Server {
        the listen 80;
        www.test2.com server_name;
        access_log logs / main test2.access.log;
        LOCATION / {
            index index.html;
            the root /var/www/test2.com/htdocs;
        }
        }
}

establish word file in the folder in the parent folder executed subdomain
    Server {
        the listen 80; # can also be used xxxx: 80 indicates
        .. server_name star.test1.com WWW * * .test1.com test3.com; #_ * :?
            # plurality of host names separated by spaces
        root / the PATH / the TO / WERROOT / $ Host;
        error_page 404
        access_log logs / star.test1.com.access.log;
        LOCATION / {
            the root / the PATH / the TO / WERROOT / $ HSOT /;
            index the index.php;
        }

        .. ~ LOCATION * ^ + (JPG | JPEG | GIF | CSS | PNG | JS | ICO | HTML) {$
            access_log OFF;
            Expires 30d;
        }

        LOCATION ~ {/.ht
            the deny All;
        }
    }
    
    instruction:
    Expires [Time | epoch | max | pff]: http can modify the response of the "Expires" and "cache-control" header (page cache control play the role)
        default value: off
        parameter:
            Time: use positive or negative. "Expires" header is added to the setting value of the time value determined by the current time;
                  may control the "Cache-control": time = negative: Cache represents-NO
                                   time = 0 or a positive number: indicates time = Age-max
    
            Epoch: Specify "Expires" is January 1, 1970,00: 00: 01 GMT;
            max: Specifies the "Expires" to 31 December2037 23: 59: 59GMT, "
            -1: Specifies the "Expires" for the current server time -1s, that is never expired;
            OFF: does not modify the value of the "Expires" and "Cache-Control" is.