acme.sh

acme.sh is a Unix shell script for automatically obtaining and renewing free SSL/TLS certificates from Let's Encrypt using the ACME protocol. It is designed to be simple, powerful, and dependency-free, running on various Unix-like systems including Linux, BSD, and macOS. The tool supports multiple DNS providers and web servers, enabling automated certificate management for secure websites.

Also known as: acme.sh script, acme shell, acme-sh, acme sh, acme

Why learn acme.sh?

Developers should use acme.sh when they need an automated, lightweight solution for managing SSL/TLS certificates, especially in environments where minimal dependencies are preferred, such as embedded systems or containers. It is ideal for scenarios requiring frequent certificate renewals, integration with custom DNS setups, or deployment on servers without root access, as it can run in user mode.

Learning Resources

• docs: acme.sh Official Documentation
• docs: Let's Encrypt Documentation
• tutorial: How to Use acme.sh for SSL Certificates - Tutorial
• video: Automating SSL with acme.sh - Video Guide
• book: Mastering SSL/TLS with Let's Encrypt - Book