A site for Linux lovers worldwide. For newbies, system engineers, administrators, and everybody in between. We cover all things Linux, plus various programming languages, including Python, Javascript, and PHP.
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This article explains absolute paths and how they differ from relative paths, getting them, and how symbolic links are handled. FileSystem Paths A path is the location of a file in a file system. It’s the directions to the file in the folder it is located. A path… Read More »Getting the Absolute (Full) and Relative Path In Linux
The Linux/Bash shell has three data streams that you can tap into when executing commands – stdin, stdout, and stderr. Here’s how to use them. stdin, stdout, stderr allow for the display of text in the console, and the data being output each stream can be directed into other programs. These… Read More »Redirect stdin, stdout, stderr in Linux/Bash, With Examples
Here’s a short and sharp article on how to remove a user from a Linux system. These examples will work on the majority of Linux distributions. The userdel Command The userdel command can be run from the Linux shell to remove a user. Here’s the syntax: userdel OPTIONS USERNAME… Read More »Remove a User From the Linux Command Line/Shell – How to Do It
Here’s a bunch of reasons to try out (or continue using) Linux in 2021. Lots has changed on the Linux front in the last decade – here’s why you should give Linux a go. I’ve been using Linux on desktop computers since the early 2000s… Read More »Why You Should Use Linux in 2021
In this article, you’ll learn about absolute values – what they are, how they’re used, and how to use the Python abs() function to calculate them. What is the Absolute Value of a Number? The absolute value of a number is that number’s value without any regard to its sign.… Read More »Calculating Absolute Values in Python, With Examples
Here’s a short article on concatenating (merging) strings in Bash – the right way. Examples included. There are various ways two or more strings could be joined in a shell script. Various programs will accept strings and return them merged/concatenated – but using the side-effect… Read More »Concatenate Strings in Bash/Shell Scripts, With Examples
This article will show you simple methods to pass command line arguments to your Python scripts, with some examples. Passing arguments to your script makes it easy to build multi-use scripts that can work on different inputs. This is much easier than re-editing your code… Read More »Command Line Arguments in Python Scripts, With Examples
The PHP include expression allows you to import code from another file and import code from external PHP libraries. Here’s how to use it, with examples. PHP include will execute and import PHP code from another file or library. It allows you to re-use code and… Read More »PHP include – How to Use It, With Examples
This article will explain callback functions in JavaScript – what they are, why they’re used, and how to use them. What is a Callback in the JavaScript Programming Language? A callback function is a function that is passed as a parameter to another function to be… Read More »JavaScript Callback Functions How-To, With Examples
Math is easy, Bash scripting is easy, so performing math/arithmetic in Bash/Shell scripts should be easy too. It is. Here’s how to do it. Working with Integers Bash’s built-in arithmetic can only handle integer (whole number) values. If you attempt to declare a variable with a non-integer… Read More »Math/Arithmetic in Bash/Shell Scripts, With Examples
