nginx is a web server
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:
List the process:
ps -ax | grep nginx
16015 ? Ss 0:00 nginx: master process /usr/sbin/nginx
16016 ? S 0:00 nginx: worker process
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 {
}
}
All conf file placed into include /etc/nginx/conf.d/*.conf are automatically loaded thanks to this line in nginx.conf
http {
....
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
}
Only for Debian, the default nginx.conf file has the following conf
http {
....
include /etc/nginx/sites-enabled/*;
}
They use then the following structure:
HTTP - Gateway (Reverse Proxy) - Network - Load Balancer (NLB, ALB, CLB)
sudo apt-get install nginx
sudo yum update -y
sudo yum install nginx -y
Verification that Nginx is up
curl -I 127.0.0.1
HTTP/1.1 200 OK
Server: nginx/1.16.1
Date: Wed, 01 Jan 2020 10:26:06 GMT
Content-Type: text/html
Content-Length: 4833
Last-Modified: Fri, 16 May 2014 15:12:48 GMT
Connection: keep-alive
ETag: "53762af0-12e1"
Accept-Ranges: bytes
https://www.nginx.com/resources/wiki/start/topics/recipes/dokuwiki/