This post follows up on Part 1 by examining the many ways that you can test the value of variables – e.g., whether they equal particular strings like “yes” or “no”, if they have a numeric value, if ...

The command-line interface (CLI) is the cornerstone of interacting with the Linux operating system. It allows users to enter commands directly, offering greater control and flexibility compared to ...

Here are steps you can take to ensure that your bash scripts work as intended and are easy to update. Committing routine and even rarely required tasks to scripts is almost always a big win because ...

We often read (including in the book Advanced Bash-Scripting Guide by Mendel Cooper) that if we pass variable names as parameters to functions, they will be treated as string literals and cannot be ...

If you're a cybersecurity enthusiast or ethical hacker who wants to learn more about building hacking tools, this book is for ...

I have a simple API running in Flask on a Raspberry Pi. The Pi has Debian (buster) installed. In the API, I am making calls to Twilio. I'm storing sensitive info like the auth token in environment ...

A recent post about debugging constructs surprised me. There were quite a few comments about how you didn’t need a debugger, as long as you had printf. For that matter, we’ve all debugged systems ...

If you are a traditional programmer, using bash for scripting may seem limiting sometimes, but for certain tasks, bash can be very productive. It turns out, some of the limits of bash are really ...

Linux 101: What are environment variables? Your email has been sent Jack Wallen introduces you to Linux environment variables. What are they and how are they set and ...