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.

Demystifying Docker DNS: How Containers Talk November 15, 2023

Demystifying Docker DNS: How Containers Talk

An overview of how Docker’s built-in DNS resolver enables container-to-container communication and service discovery. Covers default configurations, custom DNS setups, and practical use cases.
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Working with Multiple Content-Security-Policy Headers September 28, 2023

Working with Multiple Content-Security-Policy Headers

Multiple Content-Security-Policy headers do not combine; the most restrictive one always wins. Learn how to correctly configure CSP in nginx by consolidating directives into a single header.
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The Beer Drinker's Guide to SAML Duo Security September 11, 2023

The Beer Drinker's Guide to SAML Duo Security

A plain-English walkthrough of how SAML authentication works, using the analogy of buying a beer at a concert. Covers IdP and SP configuration, IdP-initiated vs SP-initiated flows, and practical troubleshooting steps.
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How to Start a SysV Init Script After Network Starts June 27, 2023

How to Start a SysV Init Script After Network Starts

Configure a legacy SysV init script to wait for network availability in RHEL 7 by adding the Required-Start LSB directive. This guide shows how systemd honors those headers so third-party initscripts start in the correct order.
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Override systemd unit files June 27, 2023

Override systemd unit files

Learn how to safely override systemd unit and timer files using systemctl edit, avoiding the pitfalls of editing package-managed files directly. Covers creating drop-in overrides, full replacements, and reverting changes.
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How to Change Docker Root Data Directory June 2, 2023

How to Change Docker Root Data Directory

A step-by-step guide to relocating the Docker data directory to a new path. Covers daemon configuration, data migration, and cleanup for both older and newer Docker versions.
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