Author: Rahul

Strace is a powerful command-line tool that can be used for tracing system calls and signals in Linux. It is an essential tool for system administrators, developers, and programmers to debug issues and optimize system performance. In this article, we will provide a complete guide to mastering the Strace command in Linux. What is Strace? Strace is a system call tracer that captures and displays the system calls made by a program or process. It can also display signals and other related information. Strace is a powerful tool for debugging issues in applications or for investigating system performance issues. Strace…

Linux is a popular open-source operating system used by developers, system administrators, and everyday computer users around the world. One of the most powerful features of Linux is its ability to manage processes and services. Processes are individual instances of a program that run on the system, while services are background processes that provide various functions to the system. In this comprehensive guide, we’ll take a closer look at how to work with processes and services in Linux. Processes in Linux A process in Linux is an instance of a program that is running on the system. Each process has…

JavaScript is a versatile programming language that supports a wide range of programming paradigms. One of the most powerful features of JavaScript is closures, which allow developers to create powerful and flexible code. In this article, we will explore what closures are and how they work, along with some examples. What is a Closure in JavaScript? A closure is an inner function that has access to the outer function’s variables, parameters, and arguments. The inner function can access these variables even after the outer function has returned. A closure allows you to encapsulate and protect data within a function, preventing…

JavaScript is a versatile and powerful programming language that has been used extensively in the development of web applications. As a developer, it’s essential to have a solid understanding of the language’s capabilities and advanced techniques to create robust, efficient, and scalable web applications. Here are 15 advanced JavaScript techniques that every developer should know. 1. Closures Closure is a powerful technique in JavaScript that allows you to create functions with persistent state. Essentially, a closure is a function that “remembers” the environment in which it was created. This can be useful for creating private variables, as well as for…

Async/await is a feature of JavaScript that allows developers to write asynchronous code in a more synchronous-looking way. With async/await, developers can write code that waits for an asynchronous operation to complete, without blocking the main thread of execution. In this article, we’ll explore how to use async/await in JavaScript with some examples. Syntax of Async/Await The syntax of async/await is fairly simple. To define an asynchronous function, you add the async keyword before the function keyword, like this:

Inside the async function, you can use the await keyword to wait for a Promise to resolve, like this:

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Zsh is a powerful shell that provides a wide range of features and functionalities to enhance the user’s experience. One of the key features of Zsh is its support for special variables, which allow users to perform various tasks easily and efficiently. In this article, we will explore some of the most useful special variables in Zsh and discuss how they can be used to improve your shell scripts. $0 – Get the running script name The $0 variable in Zsh refers to the name of the current script or shell being executed. This variable is particularly useful when you…

Sed, short for “stream editor”, is a powerful text-processing tool that is commonly used in Linux and Unix systems. It can perform a wide range of operations on text files, including searching, replacing, inserting, and deleting lines. One common task that users often need to perform with Sed is uncommenting lines in a text file. In this article, we’ll provide a guide to mastering Sed and using it to uncomment lines in text files. Before we dive into the specifics of using Sed to uncomment lines, let’s first define what we mean by “uncommenting.” In programming, a comment is a…

Disk Input/Output (I/O) is a critical aspect of system performance in Linux environments. Efficiently monitoring and managing disk I/O is essential for system administrators, as it enables them to identify potential bottlenecks, troubleshoot performance issues, and optimize their systems. This comprehensive guide will cover various tools and techniques to monitor disk I/O in Linux systems. 1. Understanding Disk I/O Disk I/O refers to the process of reading data from or writing data to a storage device, such as a hard disk or solid-state drive. High disk I/O can lead to slow system performance and impact overall user experience. Monitoring disk…

Sending emails is an essential task for system administrators, and PowerShell makes it simple to automate this process using remote SMTP. In this article, we will provide you with a PowerShell script that will send an email through remote SMTP. This script will allow you to send emails automatically, without having to do it manually, saving you time and improving your productivity as a system administrator. By creating this PowerShell script, you can automate your email sending process, and ensure that the messages are sent quickly and efficiently, without having to worry about typing out the same email over and…

Bash is a powerful shell that provides a wide range of special variables that can be used to manipulate and control the behavior of scripts. These variables provide essential information about the environment in which the script is running, including the command-line arguments, the current process ID, and the status of the last executed command. In this article, we’ll provide an in-depth guide to all bash special variables, including examples of their usage and common pitfalls to avoid. $0 – The name of the script being executed. $1-$9 – The first nine command-line arguments. $# – The number of command-line…