iproute2 Traffic Control

David Mair explains how to implement traffic management on a Linux router.

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Accessing File Systems on Disk Block Image Files

David Mair shares a variety of examples, tricks, and techniques for using the loopback block driver on Linux.

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Making Sense of Hexdump

I often work with binary data that has a format I could interpret if only I could see it in a human readable form. Most text editors aren’t much use. One way (of many) to solve that is to use the hexdump utility. hexdump is very versatile and allows you to look at the structure inside binary files as you see fit and once you learn how to use it you can apply it quickly to many problems. I think that easily qualifies as cool.

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Simple Firewall Configuration Using NetFilter/iptables

Here’s a new cool solution by David Mair that walks you through the creation of a simple iptables firewall explaining how it works along the way.

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