Month: May 2021

We’ve covered using variables in Bash previously – this article will explain Bash array variables and provide some example usage. What is an Array An array is a type of variable that can hold multiple values. It’s a list of values you can loop through and perform operations on each individual value. For example, you might want to perform an action on a list of files. By storing that list as an array, you can loop through the file names in it and perform the action on each … Read more

This article will explain what the $@ is in Bash and Bash/Shell scripting and how and why you might use it. The $@ variable is a special variable in Bash which holds the value of all of the command line arguments/parameters passed to the script. Command Line Arguments/Parameters in Bash Using command-line arguments/parameters in shell scripts is an important and useful feature, so we have a full article on it: This article follows on from our article on Command Line Arguments in Shell/Bash Scripts $@ Contains All Parameters/Arguments Passed to … Read more

The diff command is an easy way to compare files or directories from the Linux shell. This article will show you how to use it, with some examples of common usage. The diff command performs a line-by-line comparison of two files or directories and outputs the differences between them. Why would you want to compare files or directories? You might have two files with the same name that look similar and want to see the difference between them. Comparing changes to the programming code in a project you’re … Read more