Nginx

Process

nginx has one master process and several worker processes. The main purpose of the master process is to read and evaluate configuration, and maintain worker processes. Worker processes do actual processing of requests.

The nginx.pid file that holds the process id is written in the directory:

• /usr/local/nginx/logs
• or /var/run.

List the process:

ps -ax | grep nginx

16015 ?        Ss     0:00 nginx: master process /usr/sbin/nginx
16016 ?        S      0:00 nginx: worker process

HTTP request processing

See Nginx - HTTP Request Processing

Default block

The web content is served from a root directory which is by default /var/www/html but you may control your configuration file to find it (below is the location at /usr/share/nginx/html

server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
        location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }
    }