Author: Rahul

Elasticsearch is a real-time, distributed, and scalable search engine based on Lucene, enabling users to store, search, and analyze massive volumes of data swiftly. It’s often used for log and event data analysis in IT environments. In this guide, we will explain how to install and configure Elasticsearch on Ubuntu 22.04. Please note, this guide assumes that you are working as a non-root user with sudo privileges configured on a Ubuntu 22.04 server. Step 1: Installing Java Since Elasticsearch is built using Java, we need to install it. At the time of writing, Elasticsearch requires at least Java 8 to…

The Fibonacci sequence is a series of numbers where the next number is found by adding up the two numbers before it. The sequence starts with 0 and 1. These are the first and second terms, respectively. For example, the sequence up to the 7th term is as follows: 0, 1, 1, 2, 3, 5, 8. In Python, we can implement a Fibonacci sequence using different approaches. This article will focus on two methods: generating a Fibonacci sequence up to a certain number of terms, and generating a Fibonacci sequence up to a given maximum number. 1. Fibonacci Sequence up…

The Fibonacci sequence is an interesting mathematical concept, used in various aspects of computer science, from algorithms to database systems. In this article, we will look at how you can create a Bash script to generate the Fibonacci sequence. We’ll approach this in two ways: first, generating a specific total number of elements in the sequence, and second, generating the sequence up to a given maximum number. Bash Script for Printing a Total Number of Fibonacci Numbers The first approach is to write a script that prints a set number of Fibonacci numbers. Here, the user specifies the total number…

The Fibonacci Sequence is a series of numbers in which each number (Fibonacci number) is the sum of the two preceding ones. The sequence often starts with 0 and 1. In mathematical terms, the sequence is defined by the recurrence relation: Fn = Fn-1 + Fn-2 with seed values: `F0 = 0` and `F1 = 1`. The first few Fibonacci numbers are: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on. In this article, we will see how to generate Fibonacci numbers in the C programming language using two different methods. The first method will print…

As the trend toward secure web traffic continues to increase, more sites than ever are using SSL/TLS certificates to ensure secure communication between servers and clients. Among the many options for obtaining these certificates, Let’s Encrypt stands out as a reliable, free, automated, and open Certificate Authority (CA). They provide a convenient wildcard certificate, which is handy when you have a site with multiple subdomains. This article will provide a step-by-step guide on how to renew your Let’s Encrypt wildcard certificate using DNS validation. Prerequisites Before proceeding, you will need: A domain name with a wildcard certificate issued by Let’s…

Hello friends! Today, we are going to talk about something very simple but super important in maths – even and odd numbers. Don’t worry if you’re new to this. I’ll explain it in a way that’s easy to understand, like chatting with a friend over chai! Let’s dive in. Definitions In maths, every number is either even or odd. It’s like dividing numbers into two teams. But how do we know which team a number belongs to? It’s all about whether you can divide the number by 2 or not. Let’s break it down: Even Numbers: These are numbers that…

JavaScript’s `sessionStorage` is an essential tool for managing data within a user’s browser session. It is a part of the Web Storage API that also includes `localStorage`. This guide will walk you through the usage of `sessionStorage`, its benefits, and its limitations. We will illustrate these points with clear, practical examples. What is sessionStorage? `sessionStorage` is a type of web storage that allows you to store key-value pairs in a web browser. The stored data remains intact only until the browser or tab is closed, making it an ideal choice for data that needs to persist across various pages of…

In databases, a superuser is a user with the highest access level, allowing them to do anything in the system. In MySQL, a superuser can create, change, or delete databases, tables, and data. This guide will show you how to make a superuser in MySQL so you can manage your databases well. What is a Superuser? A superuser in MySQL is a user with all the permissions. This means they can do important tasks like managing other users and their permissions, creating and deleting databases, checking and stopping active tasks, and more. Since superusers have a lot of control, it’s…

In DevOps and Infrastructure as Code (IaC), Terraform is a popular tool. It helps engineers manage and set up their infrastructure in a simple and organized way. This guide will help beginners learn Terraform with easy examples. Introduction to Terraform Terraform, created by HashiCorp, is a free tool that lets you turn APIs into configuration files. This way, you can manage your infrastructure like code. Using IaC has many benefits, such as making things faster, consistent, and repeatable. Terraform works with many platforms, like AWS, Google Cloud, Azure, and more. Before You Begin Before starting with Terraform, make sure you…

Docker has changed the way software is made by using containerization. This means creating light, consistent environments that can be reused easily. Containers can be helpful, but they have some tricky parts too, like managing timezones. This guide will show you how to change the timezone in a Docker container. Understanding Timezone in Docker By default, Docker containers use UTC (Coordinated Universal Time) as their timezone. This means all time-related actions in a Docker container follow UTC, no matter what timezone your main computer uses. This standardization helps apps run smoothly, no matter where they are in the world. However,…