A deep dive into PreScend, a free anonymous retirement savings calculator built with Spring Boot and vanilla JavaScript. Covers the projection math, tax-efficient withdrawal logic, anonymous session design, and deployment on AWS for ~$22/month.
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Notes on software, architecture, and engineering.
How to combine multiple physical ethernet ports into a single bonded interface using Netplan, with an overview of bonding modes and a practical configuration example.
SSH is powerful, but opening port 22 to the public internet invites constant brute force attempts. This guide covers four hardening strategies: disabling root login, SSH key auth, Fail2Ban, and tunneling through a VPN.
How to integrate DataSonnet's string-based mapping into a Spring Boot application, covering input validation, Swagger console setup, database queries, and HTTP requests.