All the notes
This archive contains only material that is currently maintained. Pages come from scoped practical work or source-bounded research; material that cannot be reviewed reliably is revised, replaced, or removed from the public index.
SSH Login Keys Explained: A Deep Comparison of Ed25519, ECDSA, RSA, FIDO2, and Certificates
SSH keys are not one thing: algorithm, file format, hardware protection, and certificate policy solve different problems. This guide compares the major choices and gives practical defaults for personal servers, teams, and production fleets.
SSH Key Formats Explained: Why Mac and iPhone Need Different Private-Key Files
A practical guide to using one Ed25519 identity across a Mac, iPhone, and Linux server without confusing OpenSSH, PKCS8, public keys, or key algorithms.
SSH Host Key Changed: A Safe Recovery Guide for Rebuilt Servers and Reused IPs
How to distinguish a legitimate server rebuild from a man-in-the-middle warning, remove a stale known_hosts entry, and verify the new host key before reconnecting.
SSH Permission Denied (publickey): A Layer-by-Layer Debugging Checklist
A repeatable way to debug public-key authentication by separating network reachability, key selection, server authorization, permissions, and account policy.
A Safer SSH Key Workflow Across Mac, iPhone, and Remote Development Tools
Design a cross-device SSH setup that is recoverable, auditable, and easy to revoke—without passing private keys through chat or weakening host verification.
Build a content site that lasts: a practical architecture for solo makers
A calm, repeatable system for publishing technical notes, tools, and guides without creating a maintenance burden.
A solo maker's publishing checklist for useful technical articles
A repeatable pre-publish review for turning notes and experiments into clear, trustworthy articles.
What I check before shipping a Next.js site to production
A practical release review covering routes, metadata, accessibility, performance, and the small failures that are easy to miss.