Frequently used curl commands for troubleshooting HTTP, DNS, TLS, latency, proxies, and APIs

How lrzsz, ZMODEM, terminal streams, PTYs, iTerm2 coprocesses, and nested SSH sessions work together

A practical guide to InfluxDB’s data model, storage architecture, deployment options, and trade-offs versus Prometheus.

Concise Alfred shortcuts and examples

How Prometheus decides when a time series becomes stale, when stale markers are written, and how they interact with the 5-minute lookback window.

A deep dive into HashiCorp Consul, exploring its architecture, how it implements a service mesh with Envoy, and detailed component workflows.

A comprehensive look at the architecture, components, and production use cases of the Calico CNI.

Buffer vs Cache in Linux — what each really caches, how free and /proc/meminfo define them, and how to verify

binary heap: structure, operations, and applications

Understanding LLM fundamentals — tokenization, embedding, attention, and text generation with concrete examples