Harbor in Höfn, Iceland.

Bob's Blog

All Posts, Oldest First

How Not to Get a Job
In which I stumbled into a teaching job through mistaken identity, with the involvement of a doomsday cult.

Cybersecurity Certifications are Unfair
Cybersecurity certifications are not a fair test of knowledge, let alone skill. They have an illusion of relevance and meaning, making more money for the certifying companies.

Which Programming Language Should I Learn?
Someone asked me, "Which programming language should I learn?" It depends on what you want to do.

Why the Command Line Rules
Many tasks are much easier to accomplish from the command line. Some tasks can't be done any other way.

How to Start Writing Scripts
Someone asked me, "How can I learn scripting?" It's easy to get started! Bash or Python or whatever!

Learn How to Write a Shell Script to Analyze Logs
Write a shell script to analyze logs and generate a report. We'll start by reporting the web server's 20 most popular pages.

What's the Point of Asymmetric Encryption?
Asymmetric encryption is often described as useful for "small messages", but that's misleading. They're absolutely vital in cryptographic protocols such as key agreement and authentication.

How Does Asymmetric Cryptography Work?
Asymmetric cryptography is a vital tool, but how does it work? We have two major solutions now, with more on the way. Learn how asymmetric ciphers protect information.

What Does "FIPS" Mean?
People often casually speak of "FIPS compliance", but that could mean multiple things. If it matters — and why else speak of it — we must be careful.

What's Up With My Social Media Postings?
I have an automated Mastodon identity that posts numerous factoids of widely varying relevance. What's going on?.