In Bash, a variable is a name assigned to a piece of data that can be changed during the script execution. Variables are typically used to store numbers, strings, or file names, which can be ...

You’ll also learn how to apply this script to multiple files in a folder and how to customize file names with the source file and selected variables. Finally, I’ll show you how to store the output ...

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 presume to tell ...

When preparing scripts that will run in bash, it’s often critical to be able to set up numeric variables that you can then increment or decrement as the script ... lines in a file named ...

Variables often look like $var, but they also look like $1, $*, $? and $$. Let's take a look at what all these $ values can tell you. A lot of important values are ...

Another way to make system-wide changes is to modify the /etc/profile file or add a script to the /etc ... backup or manually correcting the PATH variable can resolve most issues. Modifying the PATH ...

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 unset? How many times have you ...