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 ...

In our first tutorial on command line wizardry, we covered simple redirection and the basics of sed, awk, and grep. Today, we're going to introduce the concepts of simple variable substitution and ...

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 ...

Few aspects of Unix system administration are more intimate than the relationship between the admin and their chosen shell. After all, the shell is the most fundamental interface to the system, the ...

Bash scripting is often seen as a convenient tool for automating repetitive tasks, managing simple file operations, or orchestrating basic system utilities. But beneath its surface lies a trove of ...

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 ...