As someone who works in IT, I hear and read a lot of comments about science. One common but unfortunate claim is that “science is not about finding truth.” While I won’t get into the underlying philosophical reasons behind this claim, I do want to at least respond to it on its face. Etymology of the word “science” The …

People use the term “operational excellence” in a lot of different ways. In its vaguest sense, it means continuous improvement as applied to operations. But you’re interested in what it means in the context of technology operations. And I’m here to tell you that it means automation. Operational Excellence is one of the …

Ready to get your AWS Certified Solutions Architect – Associate certification? Sybex has recently released the AWS Certified Solutions Architect Study Guide: Associate SAA-C01 Exam 2nd Edition, authored by David Clinton and myself. Go check it out!

I recently got an email from a viewer of my Practical Networking course who asked how the TCP/IP networking terms I used mapped to the Open Systems Interconnect (OSI) model. First, a bit of background. The OSI model is a generic networking model that is supposed to describe conceptually how networks carry data. Within …

After years of manually upgrading my self-hosted WordPress installation, I decided it was finally time to apply some devops principles (namely automation) to this process. I decided to use AWS Systems Manager (aka SSM). I started out by creating the following Command Document (which happens to be in YAML format because …

If you’ve ever created a private hosted zone in Route 53, you may have noticed it always assigns the same name servers: 1 ns-1536.awsdns-00.co.uk. 2 ns-0.awsdns-00.com. 3 ns-1024.awsdns-00.org. 4 ns-512.awsdns-00.net. The numbers don’t seem to be coincidental. 1536 is the RFC number for “Common DNS Implementation …

Tell them what you’ll tell them, tell them, then tell them what you told them. This advice, although well meaning, isn't always the best approach. Although repetition has its place, repeating information three times is by no means the gold standard of teaching. I want to explore a different and perhaps more …