Master Nginx in 113 Pages: A Complete Beginner‑to‑Expert Guide

Why Nginx Is Widely Adopted

Nginx is extensively used in large‑scale websites, web applications, and mobile back‑ends because of its outstanding performance, ability to handle high concurrency, and low memory consumption.

Process Model

Nginx follows a multi‑process architecture consisting of a master process and multiple worker processes.

Master process reads and validates configuration files, creates, binds and closes socket connections, manages worker lifecycles, accepts control commands (restart, upgrade, shutdown), performs graceful upgrades, and handles logging and Perl script execution.

Worker processes accept client requests, dispatch them to functional modules, perform I/O, communicate with backend servers, cache data, and send responses back to clients.

Core Configuration Overview

Virtual hosts are defined based on different IPs, ports, or domain names using the ngx_http_core_module. An example shows how to create a "Mobile web" site.

Location Directive Details

The article demonstrates detailed usage of the location block with accompanying diagrams.

Four‑Layer Access Control

Access control is implemented via the ngx_http_access_module, allowing request filtering based on client IP addresses.

File Existence Check (try_files)

The try_files directive checks a list of files in order, returning the first existing file or directory; if none are found, an internal redirect to the last parameter occurs, which must exist to avoid a 500 error.

Advanced Configuration – HTTPS

HTTPS combines HTTP with SSL/TLS to encrypt data in transit, protecting sensitive information. The article explains that both client‑side and server‑side communications are encrypted via TLS.

Reverse Proxy

Reverse proxy (also called reverse proxy) forwards external client requests to internal web servers and returns the responses. The article provides a logical call flow diagram and a production‑environment deployment structure.

Nginx File Listing

Additional screenshots illustrate directory listings and file structures within Nginx.