Author: Rahul

AWSCLI is the command line interface is unified utility that provides ability to programmers and DevOps to manage AWS infrastructure directly from the terminal. Currently the WS CLI v2 is available with the easily installation methods. This is widely supported tools available for most of popular platform like Linux, macOS and Windows systems. Alpine Linux is a simple, lightweight operating system that make is first choice for the containers that required minimal size. This tutorial will help you install and configure AWS CLI v2 on an Alpine system running under Docker containers. Alpine Dockerfile with AWSCLIv2 A Dockerfile is an…

JavaScript, like many other programming languages, includes several types of loop statements. These loops are used to perform the same operation multiple times until a certain condition is met. One of the most common types of these loops is the “while” loop. The “while” loop is fundamental to almost all programming languages, including JavaScript. It repeatedly executes a block of code as long as a specified condition evaluates to true. Once the condition becomes false, the loop terminates and the program continues with the next line of code. Syntax The syntax for a while loop in JavaScript is as follows:…

Are you looking to organize your website better by redirecting a sub-directory to a sub-domain? Using the .htaccess file can make this process simple and effective. This guide will show you how to set up redirection from a sub-directory to a sub-domain using .htaccess, helping you improve your website’s structure and user experience. Whether you’re a website administrator or a beginner looking to manage your site more efficiently, follow these straightforward steps to achieve seamless redirection. Preliminaries Before proceeding with the actual .htaccess configurations, it’s crucial to have a basic understanding of the difference between a sub-directory and a sub-domain:…

Swap space serves as a critical extension of your system’s RAM, particularly vital for systems with limited physical memory. It acts as a secondary memory resource, allowing your computer to maintain optimal performance when the RAM is fully utilized. Ensuring adequate swap space is essential for preventing performance degradation in systems with restricted RAM capacity. This article provides a comprehensive guide on how to effectively increase swap space in Ubuntu 22.04, an important step for enhancing system stability and performance. Whether you’re working with resource-intensive applications or managing multiple tasks simultaneously, expanding the swap space in Ubuntu 22.04 can significantly…

As you navigate the Linux operating system, one of the powerful tools you’ll frequently use is the sudo command. Sudo stands for “superuser do,” and it’s a command that allows you to execute other commands with administrative or ‘root’ privileges. However, for security reasons, this ‘root’ access is only granted for a short period, usually 15 minutes by default. After this time, you’ll need to re-enter your password to use sudo again. This article will guide you on how to extend this sudo session timeout. Understanding the Sudo Session When you run a command using sudo, Linux starts a new…

Network administrators and security experts often need to scan ports to identify open or closed services and evaluate the security of their networks. While there are robust tools like nmap for this purpose, sometimes you might need to create a custom solution that fits your specific requirements. In this article, we will be discussing how to create a Bash script for scanning a range of ports. Basics of Port Scanning Port scanning is the act of systematically checking a system for open ports. A port in this context is a logical construct that identifies a specific process or a type…

Port scanning is a useful technique for exploring network systems and gathering information about the services they offer. Often, security professionals and system administrators use port scanning for diagnosing network problems, auditing network security, or discovering vulnerabilities. In this article, we will go through the details of how to create a simple port scanning program using Python. Python is an excellent language for this task due to its simplicity and the availability of several powerful libraries like socket that greatly simplify network-related tasks. Prerequisites Before we get started, make sure you have Python installed on your computer. You can download…

The world of web server management comes with its fair share of security concerns. Among these is the need to restrict access to certain HTTP methods on your server to prevent potential unauthorized actions. In this article, we will delve into the intricacies of how you can configure your Nginx web server to allow only GET and POST methods, which are the most common HTTP methods for web applications. Before we start, it’s crucial to understand what GET and POST methods are. The GET method retrieves data from a specified resource, while the POST method submits data to be processed…

Apache HTTP Server, colloquially known as Apache, is one of the most popular and widely used web server software systems in the world. It offers numerous features, including the ability to restrict access to resources based on HTTP methods. This can be particularly important in cases where you want to allow only certain types of HTTP requests, like GET and POST, for reasons related to security or application logic. In this article, we will discuss how to configure an Apache web server to only allow GET and POST methods. The process involves editing the Apache configuration file, which can be…

Bash is a powerful shell scripting language that provides a wide range of commands for various operations. One of the most important commands in Bash is the “expr” command, which is used for performing basic arithmetic operations and string manipulation. The “expr” command allows you to perform mathematical calculations, evaluate expressions, and manipulate strings in a Bash script. The “expr” command is a part of the coreutils package, which is installed by default on most Unix-based systems, including Linux and macOS. It takes one or more arguments as input, and based on the type of input, it performs the appropriate…