Each Linux command returns an exit code, with 0 indicating success and non-zero values indicating failure. You can use the $? variable to access the exit code and control program flow in scripts ...

If you are writing serious bash scripts, we suggest you write them carefully. You can even find a “ lint ” program that can test for errors for you.

However, we often don’t write programs or shell scripts to take advantage of this. However, there’s no reason for this, as you’ll see. Bash Support ...

If you often find yourself writing scripts from scratch when you know you wrote something similar not all that long ago, maybe it’s time to make your scripts a bit more reusable. The usefulness ...

Jack Wallen shows how you can create a Linux shell script that requires a password without having to save a password within the script.

I've been hacking around with some Linux shell scripts for a project that are derived from existing, known good scripts. I'm using Ubuntu on WSL. The original scripts are nested, and a common ...