In this post a brief overview is given for requesting and automated renewal of (free!) Let's Encrypt SSL/TLS certificates in Arch Linux. Such certificates can be useful for web, mail and a plethora of different web services that can be secured with SSL/TLS.
Not even experts are safe from the many pitfalls that exist in implementations. Qualys, known for their Qualys SSL Labs Vulnerability Scanner (used in my research), allowed the expiration of their blog's certificate.