# Certbot

> Certbot and Let's Encrypt reference for free TLS certificates. Covers ACME challenges (HTTP-01, DNS-01), certificate issuance for Nginx/Apache/standalone, wildcard certs, auto-renewal with hooks, rate limits, and web server SSL configuration.

- Skill: `bytesagain/certbot` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bytesagain/certbot`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bytesagain/certbot/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: bytesagain (https://skillmd.com/u/bytesagain)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/bytesagain/certbot

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# Certbot Reference

Free TLS certificates from Let's Encrypt.

## Commands

| Command | Description |
|---------|-------------|
| `intro` | ACME, challenges, install |
| `obtain` | Get certs (nginx/DNS/standalone) |
| `renewal` | Auto-renew, hooks, manage |
| `webservers` | Nginx/Apache/Docker SSL config |