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.

Wrong Number! Taming the Kerberos Identity Crisis June 27, 2017

Wrong Number! Taming the Kerberos Identity Crisis

A practical look at why the MIT krb5 KDC rejects a TGS-REQ with KRB_AP_ERR_NOT_US, including the exact validation logic and the most common root causes behind the error.
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A guide to Mod_Rewrite February 22, 2015

A guide to Mod_Rewrite

Mod_rewrite is a rule-based rewriting engine (based on a regular-expression parser) to rewrite requested URLs on the fly.
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Fixing Udev 70-persistent-net.rules August 13, 2014

Fixing Udev 70-persistent-net.rules

Have you ever replaced a network interface (NIC) or performed a chassis swap? If you are an administrator or IT professional the chances are good that at some point or another you have had to deal with sticky udev rules.
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Postfix, Message Flows, and Common Issues May 18, 2014

Postfix, Message Flows, and Common Issues

Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. This post covers core system concepts.
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Postfix Command Reference May 4, 2014

Postfix Command Reference

A quick Postfix Command Reference
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Hypervisor Classifications April 5, 2014

Hypervisor Classifications

There are a variety of Hypervisors out in the in the hosting space. Here is a list of the current classifications.
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