Master Nginx: From Basics to Installation, Configuration, and Load Balancing

1. What Is Nginx and Why It Matters

Nginx is a high‑performance HTTP and reverse‑proxy web server originally released on October 4, 2004. Its key advantages include low memory usage, ability to handle around 50,000 concurrent connections, simple configuration, minimal bugs, easy installation, and long‑term stability without frequent restarts.

2. Core Functions of Nginx

Reverse proxy is the most common use case. A reverse proxy forwards client requests to a pool of backend servers, balancing the load and hiding the internal architecture. By contrast, a forward proxy acts on behalf of the client to reach external sites.

Load‑balancing is achieved through built‑in round‑robin and weighted round‑robin algorithms, allowing servers with different capacities to receive proportionate traffic.

Nginx also supports static‑dynamic separation : static assets such as CSS, JS, and images are served directly by Nginx, while dynamic requests are passed to backend applications, improving overall response speed.

3. Installing Nginx

Installation steps differ by operating system.

macOS : Use Homebrew.

Check if Nginx is already installed: brew info nginx Install with brew install nginx Root directory after installation: /usr/local/var/www Configuration file location: /usr/local/etc/nginx/nginx.conf Default listening port: 8080 Start Nginx: nginx Open a browser at localhost:8080 to see the welcome page.

Windows : Download the zip package from the official site and extract.

Linux : Install via package manager or through the Baota control panel (a popular web‑hosting UI).

4. Common Nginx Commands

nginx          # start
nginx -s stop  # stop
nginx -s quit  # graceful shutdown
nginx -s reload# reload configuration without dropping connections
ps aux|grep nginx # view running processes

Reloading is typically the only command needed after modifying configuration files.

5. Configuration Structure

The configuration hierarchy consists of:

main        # global settings
├─ events   # network connection settings
├─ http     # proxy, cache, logging, etc.
│   ├─ upstream   # load‑balancing definitions
│   ├─ server     # virtual host definitions (can be multiple)
│   │   ├─ location   # URI matching blocks (can be multiple)
│   │   └─ ...
│   └─ ...
└─ ...

A typical default nginx.conf looks like this:

worker_processes 1;  # usually set to number of CPU cores

events {
    worker_connections 1024;  # max concurrent connections per worker
}

http {
    include mime.types;
    default_type application/octet-stream;
    sendfile on;
    keepalive_timeout 65;

    server {
        listen 8080;
        server_name localhost;

        location / {
            root html;
            index index.html index.htm;
        }

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

    include servers/*;  # load additional server blocks
}

When deploying on a Linux server via the Baota panel, the default server block can be copied and adjusted (e.g., change listen to port 80, set root to /home/www, and ensure the firewall allows the chosen port).

6. Learning Resources

For deeper study, the following resources are recommended:

Video tutorial by “狂神说”: https://www.bilibili.com/video/BV1F5411J7vK

Black Horse Programmer’s Nginx course (159 lessons): https://www.bilibili.com/video/BV1ov41187bq

GeekTime’s “Nginx 100 Lectures” (paid, with occasional free access).

Written guide “Nginx from Beginner to Practice” on Juejin: https://juejin.cn/post/6844904144235413512

Studying these materials will help you become proficient with Nginx and capable of solving real‑world deployment challenges.