Article
Bash utilities make so many tasks simple, but not all tasks have a straightforward command or operator. A very common and usual task in many scripting scenarios is concatenating string variables. Bash doesn't have a built-in function or command-line utility to concatenate two strings together. However, there are many ways...
Sathiya Sarathi Gunasekaran
In Linux, ls -l would list the files and directories in a particular path, with their names, dates, and sizes (disk usage). The first thing you'll notice using that command is that the size of directories is always shown as 4096 bytes (or 4,0K if you're using ls -lh)...
Ruslan Hasanov
When managing a computer, we may want to automate some tasks to run in certain periods or at the same time on each day/week/month. On a desktop, we may schedule update checks or virus scans. On a server, it's not uncommon for a myriad of checks and clean...
SCP stands for Secure Copy Protocol. It is a tool that can be used to transfer files from a local host to a remote host, from a remote host to a local host, or between two remote hosts. In this article, we'll examine how to use SCP to copy between...
Jacob Stopak
The most common interactions with a computer nowadays are done through a Graphical User Interface (GUI). Before GUIs existed, users would interact with a computer via shell programs, a Command Line Interface (CLI) to run other programs. Despite the ubiquity of GUIs, interacting with a computer via a CLI is...
Marcus Sanatan
In this tutorial, we will show you how to permanently set your PATH on Linux. First off, why should you care? The $PATH variable, or just PATH, without the $ indicating variables, specifies a list of directories that impacts your computing platform's functionality in a critical way. This is because the...
Tendai Mutunhire
In this article we'll show you the various methods of looping through arrays in Bash. Array loops are so common in programming that you'll almost always need to use them in any significant programming you do. To help with this, you should learn and understand the various types of arrays...
Scott Robinson
When we talk about UNIX based programming, it's usually about the shells, terminals, and the command line interfaces. The most prevalent shell in this regard is Bash but there are other variants available and used widely as well, like Zsh or the Z shell. In this article, we'll attempt to...
Throughout your programming career you'll find that there are quite a few times you need to extract a substring from another string. Strings are one of the most common data structures, so this comes up often. I bet you could tell me how to do it in your favorite programming...
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