Author: Rahul

🚀 Ubuntu 24.04 LTS is here! 🎉 Upgrading to Ubuntu 24.04 LTS (Long Term Support) is a straightforward process that promises enhanced performance, security, and new features. Whether you’re upgrading from an older LTS version or a more recent interim release, this step-by-step guide will help you navigate the upgrade process smoothly. Ubuntu 24.04 LTS, also known as Noble Numbat, brings with it an array of improvements and updates that make the upgrade worthwhile for both desktop and server users. Step 1: Backup Your Data Before proceeding with the upgrade, it’s crucial to back up your important data. This can…

XRDP is a popular open-source remote desktop protocol server that allows users to connect to a Linux system using RDP clients. However, you may encounter errors when starting an XRDP session. These errors can be frustrating and hinder your remote access capabilities. This guide will walk you through the common error messages you might see and provide detailed solutions to fix them. Error Details When attempting to start an XRDP session, you may encounter the following error messages in your logs: Mar 19 14:48:11 ubuntu22 xrdp-sesman[19218]: [INFO ] starting Xorg session… Mar 19 14:48:11 ubuntu22 xrdp-sesman[19218]: [INFO ] Starting session:…

Have you ever encountered the cryptic “Too many open files” error message on your Linux system? It can be frustrating and may also stop your work progress. In this guide, we will understand about this error that is related to file descriptors, the culprit behind this error, and provide a proper solution. Understanding File Descriptors Imagine your Linux system as a bustling office. Files are documents, and processes are employees who need access to these documents to work. File descriptors act as intermediary passes – unique numbers assigned to open files. A process uses a file descriptor to interact with…

Bash, which stands for Bourne-Again SHell, is a popular Unix shell used for scripting. If you work with Bash scripts, it’s important to understand different syntax elements to make your scripts efficient and error-free. In this article, we’ll explain the differences between the ${} and $() syntax in Bash and show you how to use them. The ${} Syntax: Parameter Expansion The ${} syntax in Bash is used for parameter expansion. This means it helps you get and change the value of a variable. The syntax uses a dollar sign ($) followed by curly braces ({}) containing the variable name…

In today’s blog post, we’re diving into a fun and educational Python coding challenge that will test your skills in string manipulation and dictionary handling. This challenge is perfect for beginners who are looking to get more hands-on experience with Python. Let’s break down the challenge and then go through a step-by-step guide on how to solve it. Objective The goal is to write a Python program that counts the frequency of each alphabetic character in a given string and outputs the result in a dictionary format. Requirements User Input: The program should prompt the user to input a string.…

Java is an object oriented programming language popular among the develops. It is used for a wide range of software applications and development tasks. Installing Java on your Ubuntu system ensures compatibility and functionality for all Java-dependent operations. This tutorial focuses on installation of OpenJDK, the open-source implementation of the Java Platform, Standard Edition, on a Ubuntu 24.04 (Noble) Linux systems. Prerequisites Before proceeding to Java installation, A running Ubuntu 24.04 Linux system with root or sudo access A basic command line knowledge. Now follow the below steps: Step 1: Update Your System As a best practice make sure to…

In the realm of Linux systems administration, the crontab utility reigns supreme for automating tasks. However, crafting the perfect crontab entry can sometimes feel like solving a puzzle. Today, let’s delve into a common query: Is the execution time of a given crontab entry correct? The Crontab Entry in Question Consider the following crontab entry: */25 * * * * script_to_execute This entry appears to be scheduling a task to run at intervals of 25 minutes within each hour. But is it executing as expected? Let’s examine the scheduled times: Run at 2024-04-15 07:00:00 Then at 2024-04-15 07:25:00 Then at…

Welcome to Module 1 of our Linux System Administration Multiple-Choice Questions series! This module is designed as your first step into the world of Linux system administration. Here, you will encounter a range of questions that cover basic concepts and essential commands fundamental to managing Linux systems. Perfect for beginners or as a refresher for seasoned professionals, this module sets the groundwork for more advanced topics in subsequent modules. Q1 What is the default port number for SSH? A 21B 22C 23D 80 Show Answer Check Answer Correct Answer: B The default port number for SSH (Secure Shell) is 22.…

Welcome to our Shell Scripting Challenge! Today, we have an engaging script designed to test your understanding of some fundamental concepts in shell scripting, particularly focusing on variable scope and function behavior. Examine the script below, try running it on your own, and then explore the explanation to enhance your knowledge of how shell scripts operate. The Shell Script #!/bin/bash function mystery() { local x=2 echo $((x+2)) } x=1 echo $(mystery $x) Challenge Take a moment to predict what you think the output of this script will be when executed in a Bash shell. Writing down your guesses can help…

When developing software, maintaining clean and readable code is crucial. One common pitfall that hampers readability and maintainability is the “Arrow Anti-Pattern”. This pattern emerges when code is heavily nested, leading to a structure that visually resembles an arrow pointing to the right. Let’s explore this anti-pattern using a Java example and discuss strategies to refactor and improve the code. Understanding the Arrow Anti-Pattern The Arrow Anti-Pattern occurs primarily due to deeply nested conditional structures. This usually happens when developers continue to add levels of if statements or loops within others, often in an attempt to handle multiple conditions. While…