Found 2065 Articles for Operating System

Bash is a powerful programming language used for writing shell scripts on Linux and other Unix-based systems. One of most common tasks in shell scripting is evaluating arithmetic expressions. In this article, we will discuss how to evaluate arithmetic expressions in Bash and explore some examples. Introduction Arithmetic expressions are mathematical calculations performed on numerical values. In Bash, arithmetic expressions are evaluated using expr command, which evaluates a string as an arithmetic expression and returns result. syntax for expr command is as follows − $ expr expression Here, expression is arithmetic expression to be evaluated. For example, to evaluate ... Read More

Introduction Working with files is a common task for Linux users, and often, you may need to find longest line(s) in a file. While there are several ways to do this, there are a few simple methods that can make process quicker and more efficient. In this article, we will explore various methods for finding longest line(s) in a file in Linux. Method 1: Using wc Command The wc (word count) command is a useful tool that can be used to count number of lines, words, and characters in a file. However, it can also be used to find length ... Read More

When it comes to working with command-line utilities in Linux, there are many tools and utilities available that can make your life easier. One such utility is xargs, a command that allows you to execute commands on a list of files, or arguments, from standard input. Xargs is particularly useful when you want to perform an operation on a large number of files, and you want to do it quickly and efficiently. In this article, we will discuss various scenarios where you may need to use xargs in Linux. We will also look at some examples to illustrate how to ... Read More

Introduction In today's era of technological advancements, use of computers and various electronic devices has become an essential part of our daily routine. We often find ourselves in situations where we need to compare two files to check if they contain same content or not. This can be a daunting task, especially if files are large in size, and traditional comparison methods can be quite time-consuming. In this article, we will explore fastest methods to check if two files have same contents. What is a File Comparison? A file comparison is a process of comparing two or more files to ... Read More

Locale Environment Variables in Linux Locale environment variables in Linux play a crucial role in enabling users to communicate effectively with operating system. locale environment variables are responsible for setting language, encoding, and cultural conventions in a system. In this article, we will explore different aspects of locale environment variables in Linux. What is a Locale? A locale is a set of parameters that define user's language, country, currency, and other cultural conventions. locale defines format of dates, time, and numbers, and character sets. For example, US locale uses dollar as currency symbol, while UK locale uses pound. Similarly, US ... Read More

Linux is a free and open-source operating system that is widely used in modern computing systems. It has a rich set of features that make it one of most popular operating systems in world. One such feature is use of swap space. Swap space is a part of Linux file system that is used to temporarily store data when computer's RAM (Random Access Memory) is full. In this article, we will discuss use of swap space in modern Linux systems, its benefits, and how to configure it. What is Swap Space? Swap space is a designated area on a hard ... Read More

Introduction Linux is a powerful operating system that provides users with a command-line interface to perform various tasks. One of essential tools in Linux is sudo command. sudo command allows users to execute commands as a superuser or another user with elevated privileges. This article will explore sudo command in Linux, its usage, and different examples of its application. Understanding Sudo Command Sudo stands for "SuperUser Do, " and it is a powerful command in Linux that allows users to execute commands with elevated privileges. Sudo command is used to run a command as a superuser or another user with ... Read More

Introduction When it comes to programming, there are numerous occasions when we need to execute multiple commands and take input or output from a single command. In such cases, sending output of a command to multiple commands becomes an essential task. Sending stdout to multiple commands is one of most frequently used techniques in programming. In this article, we will discuss what stdout is and how we can send it to multiple commands with examples. So, let’s get started. What is stdout? Stdout (Standard Output) is a default stream in Unix-like operating systems, which is used to display output of ... Read More

Introduction Bash scripting is a powerful way of automating repetitive tasks and executing complex commands with a single script. With increasing popularity of web-based technologies, it's now possible to execute Bash scripts directly from a URL. This opens up a whole new world of possibilities for web developers and system administrators. In this article, we'll explore how to execute Bash scripts directly from a URL and provide some examples to help you get started. What is Bash Scripting? Bash scripting is a type of scripting language that is commonly used on Unix-based systems such as Linux and macOS. Bash stands ... Read More

Introduction Environment variables are crucial for functioning of an operating system. They are used to store information about system's environment, such as system paths, user preferences, and application settings. In Linux, managing environment variables is an essential task that can be easily done using command-line tools. In this article, we will explore different methods of managing environment variables in Linux. We will discuss how to view, set, and delete environment variables, and how to make them persistent across sessions. Viewing Environment Variables The first step in managing environment variables is to view current list of variables. In Linux, you can ... Read More