certbot

Installation
SKILL.md

Certbot

Certbot is a free, open-source software tool for automatically using Let's Encrypt certificates on manually-administrated websites to enable HTTPS.

When to Use

  • VPS Hosting: Running Nginx/Apache on a VM (EC2, DigitalOcean) and need SSL.
  • Homelab: Securing local services exposed via DDNS.
  • Wildcards: Issuing *.example.com certificates (requires DNS plugin).

Quick Start (Nginx on Ubuntu)

sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot

# Auto-configure Nginx
sudo certbot --nginx
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Feb 10, 2026