Luke Hebert
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Welcome to the articles section, where business, technology, and everyday problem-solving meet. You’ll find practical how-tos, troubleshooting notes from the trenches, and the occasional take on whatever’s happening in the world. Some posts will save you time, some will spark ideas, and a few will just be me thinking out loud. Grab a coffee and dig in.

Graph Database White Papers April 14, 2025

Graph Database White Papers

An overview of graph databases, their structure, and advantages over relational models. Covers how nodes, relationships, and the Cypher query language work together to model complex data.
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Udev Diagnostic Test for a Broken /dev/null Node February 27, 2025

Udev Diagnostic Test for a Broken /dev/null Node

A walkthrough of using udevadm to diagnose and inspect udev rule application on a /dev/null device node. Covers the test command syntax and interprets the output for troubleshooting permission issues.
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Postgres per-table autovacuum management October 28, 2024

Postgres per-table autovacuum management

Tune Postgres per-table autovacuum settings and track them with a single SQL view. Covers global defaults, table-specific overrides, and a ready-to-use monitoring query.
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Catching Packets: Tuning Linux Network Inbound October 11, 2024

Catching Packets: Tuning Linux Network Inbound

A deep dive into how the Linux kernel receives network packets, covering the full path from NIC hardware through NAPI, softirqs, GRO, RPS, and protocol layers. Includes practical monitoring commands and tuning knobs for each stage.
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Linux Network Ring Buffers October 11, 2024

Linux Network Ring Buffers

A practical walkthrough of how Linux allocates and manages RX/TX ring buffers for network interfaces, covering DMA, softirq processing, and tuning knobs like netdev_budget.
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Myths About /dev/urandom October 4, 2024

Myths About /dev/urandom

A practical breakdown of the most common misconceptions about /dev/urandom and /dev/random on Linux, explaining why /dev/urandom is the correct choice for cryptographic randomness and why blocking on low entropy is a usability problem, not a security one.
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