Global variables or environment variables are variables available for any process or application running in the same environment. Global variables are being transferred from parent process to child ...

This project explores variables in Linux, their types, usage, and practical applications in scripting and system administration. It demonstrates how variables enhance automation, efficiency, and ...

Environment variables are simple settings that control how programs run on your computer. You can use them to change the way software behaves (without editing the actual code). ZSH or Z shell is a ...

The eval command allows you to run the contents of variables as commands and can be very useful, especially in scripts. There are probably a lot of Linux users who have never encountered the eval ...

Jack Wallen shows you how to pass environment variables to Docker containers for a more efficient development process. Did you know you can pass environment variables from your host to Docker ...

There I was, trying to come up with a topic for this column, when I did what I usually do when stumped: I sent a question out to my Twitter followers. This time, I got a great answer, from John ...

protect a variable name from surrounding characters. $ export foo=foo $ echo ${foo}bar # foo exists so this works as expected foobar $ echo $foobar # foobar doesn't ...