Shell

Bash scripting is a vital tool for developers to automate tasks in Linux. Bash scripts can be used to automate development tasks locally (like uploading files for deployment, compiling apps, or resizing images in bulk), as well as for server-side tasks (sending scheduled emails, collecting data at intervals, or sending notifications to devices). You’ll want to run some tasks dependent on the outcome of another task or variable, and that’s where if … else will help you. This decision making process in Bash scripts is called using conditionals. … Read more

In this tutorial, we explain how to use the cp command in Linux to copy files or directories. Examples are included below. Linux is one of the most popular Operating Systems on the planet and is the basis for all Android devices. It is open-source and has some clear advantages over other systems such as Windows or macOS. Within Linux, there are a considerable number of different commands that programmers use regularly. What is the cp command? The copy (cp) command is one of the … Read more

In Linux and Unix systems, tr is a command-line utility that translates, erases, and “squeezes” repeated characters – in fact, tr stands for “translate.” This guide explains how to use the tr command in Linux, with examples. It can be used for operations such as removing repeated characters, converting lowercase to uppercase, and basic replacing and removing of characters. It is often used in conjunction with other commands through piping. Linux is the basic kernel/operating system core behind much of the technology we use on … Read more

This guide explains how to use the grep utility for searching multiple words, strings, and patterns. You can find full examples of the commands used to accomplish this below. What Is Grep? When we refer to grep, we’re talking about the command-line function. Grep stands for Global Regular Expression Print. In essence, it will search input files looking for lines that are a match to a certain regular expression. It then returns results by writing each line for standard output. The grep utility is suitable … Read more

Within your computer, the central processing unit, aka the CPU, is a critical component. Despite its essential nature in performing countless data processing functions, many of us likely know very little about the CPU, hidden away inside the computer out of sight as it works its magic. Thankfully, finding CPU information on Linux systems is fairly straightforward, so let’s take a look at how it’s done. Why You Might Need CPU Information There are a few reasons why someone may want to obtain further CPU … Read more