Making the Script Executable. After writing your script, you need to make it executable with the chmod command: chmod +x myscript.sh . Basic Syntax. A Bash script typically starts with a shebang (#!) ...

Today, we're going to introduce the concepts of simple variable substitution and loops—again, with a specific focus on the Bash command line itself, rather than Bash scripting.

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t pres… ...

When writing scripts, it’s important to know how to test and validate variables. You may need to verify that required arguments are provided and that the values match what is needed.

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 ...