Install Config Introduction

This lesson covers the essentials for installing, configuring, and managing Nginx. You’ll learn:

How package managers work and which to use on common platforms.
How to install Nginx on Ubuntu (primary), plus CentOS, macOS, and Windows.
How to manage Nginx as a service (status, start, stop, restart, reload).
How the nginx.conf file is structured and how configuration is inherited.
How to host a simple static website with Nginx and allow traffic via UFW.

A presentation slide titled "Objectives" listing three goals: understand package managers, install Nginx on Ubuntu/CentOS/macOS/Windows, and manage Nginx services (status, start, stop, reload, restart).

Package managers: overview and quick comparison

Package managers automate installing, upgrading, configuring, and removing software. Below are common examples and typical use cases:

Package manager	Platform(s)	Typical commands
`apt`	Debian, Ubuntu	`sudo apt update` / `sudo apt install nginx`
`yum` / `dnf`	CentOS, RHEL, Fedora	`sudo yum install nginx` or `sudo dnf install nginx`
Homebrew	macOS	`brew install nginx`
Chocolatey / WSL	Windows	`choco install nginx` (or run Nginx inside WSL)

Use the package manager native to your OS for the smoothest installation and updates.

When choosing where to run Nginx on Windows, prefer WSL (Windows Subsystem for Linux) for a Linux-like experience and easier parity with production Linux servers.

Install Nginx — quick commands by platform

Below are concise, platform-specific instructions. These are the most common, production-friendly approaches. Ubuntu (Debian-family)

sudo apt update
sudo apt install -y nginx
# Verify installation, enable at boot
sudo systemctl enable --now nginx

CentOS / RHEL / Fedora

# On CentOS 7/8 or RHEL; use dnf on newer distributions:
sudo yum install -y nginx
# or
sudo dnf install -y nginx

# Start and enable at boot
sudo systemctl enable --now nginx

macOS (Homebrew)

brew update
brew install nginx
# Start Nginx (Homebrew service)
brew services start nginx

Windows

Recommended: use WSL and follow the Ubuntu instructions inside the WSL environment.
Alternatively, use Chocolatey:

choco install nginx

Manage the Nginx service

You will commonly use systemctl on modern Linux systems. Here are the essential commands:

Action	systemd (`systemctl`)
Check status	`sudo systemctl status nginx`
Start	`sudo systemctl start nginx`
Stop	`sudo systemctl stop nginx`
Restart	`sudo systemctl restart nginx`
Reload configuration (graceful)	`sudo systemctl reload nginx`
Enable at boot	`sudo systemctl enable nginx`

Older SysV init / compatibility:

sudo service nginx start
sudo service nginx stop
sudo service nginx reload

Reloading (reload) applies configuration changes without terminating worker processes; use restart when you need a full restart. Always test config before reloading: sudo nginx -t.

Understanding nginx.conf: structure and inheritance

Nginx configuration is hierarchical. The main contexts you should know:

Main/global context (top-level): process-wide directives (user, worker_processes, error_log).
events context: connection handling directives (e.g., worker_connections).
http context: HTTP server configuration, MIME types, logging, upstreams, and general server directives.
server blocks: Virtual hosts — listen addresses, server_name, SSL, access logging.
location blocks (inside server): How requests are routed and handled for specific URIs.

Minimal example (illustrative):

user www-data;
worker_processes auto;
error_log /var/log/nginx/error.log warn;

events {
    worker_connections 1024;
}

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

    server {
        listen 80;
        server_name example.com www.example.com;

        root /var/www/example;
        index index.html;

        location / {
            try_files $uri $uri/ =404;
        }
    }
}

Always validate changes before reloading:

sudo nginx -t
sudo systemctl reload nginx

Host a static website with Nginx

Typical steps to serve a simple static site:

Create the document root and a test page:

sudo mkdir -p /var/www/example
echo "<h1>Hello from Nginx</h1>" | sudo tee /var/www/example/index.html
sudo chown -R www-data:www-data /var/www/example

Create a server block (virtual host). On Debian/Ubuntu, use sites-available and sites-enabled:

# /etc/nginx/sites-available/example
server {
    listen 80;
    server_name example.com www.example.com;

    root /var/www/example;
    index index.html;

    location / {
        try_files $uri $uri/ =404;
    }
}

Enable the site and reload:

sudo ln -s /etc/nginx/sites-available/example /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl reload nginx

If you use a different path or platform, adapt the file locations accordingly.

Networking basics & firewall (UFW)

Nginx commonly uses these ports:

Service	Port	Description
HTTP	80	Unencrypted web traffic
HTTPS	443	Encrypted web traffic (TLS)

Allow HTTP/HTTPS through UFW on Ubuntu:

# Allow pre-defined Nginx profiles
sudo ufw allow 'Nginx Full'   # allows ports 80 and 443
# Or allow only HTTP:
sudo ufw allow 80/tcp
# Enable/Status:
sudo ufw enable
sudo ufw status

You can also permit only HTTP or HTTPS as needed ('Nginx HTTP' or 'Nginx Full').

Links and references

Nginx documentation: https://nginx.org/en/docs/
apt (Debian package manager): https://wiki.debian.org/Apt
yum (package manager overview): https://en.wikipedia.org/wiki/YUM_(package_manager)
Homebrew (macOS package manager): https://brew.sh
UFW (Uncomplicated Firewall): https://help.ubuntu.com/community/UFW

Use these resources for deeper configuration examples, SSL/TLS setup, reverse proxy patterns, and performance tuning.

Introduction

Install & Config

Intermediate Config

Security

Performance

Conclusion

Install Config Introduction

Package managers: overview and quick comparison

Install Nginx — quick commands by platform

Manage the Nginx service

Understanding nginx.conf: structure and inheritance

Host a static website with Nginx

Networking basics & firewall (UFW)

Links and references

Watch Video

​Package managers: overview and quick comparison

​Install Nginx — quick commands by platform

​Manage the Nginx service

​Understanding nginx.conf: structure and inheritance

​Host a static website with Nginx

​Networking basics & firewall (UFW)

​Links and references

Watch Video

Package managers: overview and quick comparison

Install Nginx — quick commands by platform

Manage the Nginx service

Understanding nginx.conf: structure and inheritance

Host a static website with Nginx

Networking basics & firewall (UFW)

Links and references