Author: Rahul

Java is the most popular object-oriented, robust, platform-independent programming language. A large number of applications developed on Java required a system has Java installed. OpenJDK is an open-source implementation of Java available freely for production use. This guide will help you to install Java (OpenJDK 17, 11, and 8) LTS releases. Also, help you to install Oracle Java 17 LTS) on your Ubuntu system. You will also find the instruction’s to switch between multiple installed Java versions. Installing Java on Ubuntu Java 17 is the latest LTS release available for installation. JDK packages provide the full Java development libraries, helpful…

Ubuntu, a leading Linux distribution, offers a variety of Display Managers to enhance user experience. This article delves into how to switch between three popular Display Managers: GNOME Display Manager (GDM), LightDM, and Simple Desktop Display Manager (SDDM). Whether you’re a seasoned Linux user or new to Ubuntu, this guide will provide step-by-step instructions for optimizing your system’s graphical login interface. Understanding the Display Manager A Display Manager is a graphical login program and session manager that is responsible for user authentication. It is a totally separate application from the desktop environment. Display Manager is also known as “login manager”.…

The login screen is the first thing you see when booting up your Ubuntu system, and customizing its background can add a personal touch to your overall desktop experience. In this article, we will explore a powerful tool called “ubuntu-gdm-set-background” available on GitHub, which allows users to easily change the login screen background in Ubuntu. By following this step-by-step guide, you will be able to personalize your login screen with your preferred image. Step 1: Installation of ubuntu-gdm-set-background To begin, we need to install the “ubuntu-gdm-set-background” tool. Follow these steps to proceed: sudo apt install libglib2.0-dev-bin Now download the script…

PHP is a programming language used for developing web applications. You must install PHP packages on a Ubuntu system to run the application written on it. Generally, it is used to create e-commerce websites, blogs, and API applications. If you’re looking for an easy way to install PHP on Ubuntu 22.04, look no further. This blog post will show you how to do it quickly and easily. We will use the Ondrej PPA for installing PHP on Ubuntu 22.04 LTS system. Which contains PHP 8.3, 8.2, 8.1, 8.0, 7.4, 7.3, 7.2, 7.1, 7.0 & PHP 5.6 packages. You can install…

The Problem: While upgrading the Ubuntu OS version, I faced the following issue with the do-release-upgrade command. Even all the current packages were upgraded with apt upgrade. sudo do-release-upgrade We faced a known issue that would not allow us to continue with the upgrade. You will see the following error message: Checking for a new Ubuntu release Please install all available updates for your release before upgrading. Here are 2 solutions available to resolve this issue. It may be one solution not worked in some situations, try another solution. Solution 1: The first solution is to disable all third-party repositories…

Problem Recently, I installed Apache Kafka on the Ubuntu system. When tried to run the consumer console script, I found the error message that “zookeeper is not a recognized option”. ./bin/kafka-console-consumer.sh –topic testTopic –zookeeper localhost:9092 zookeeper is not a recognized option Option Description —— ———– –bootstrap-server –consumer-property properties in the form key=value to … … Solution After searching a bit time, I visited to Apache Kafa QUICKSTART guide. Here I found the solution that Kafka has removed –zookeeper option and replaced it with a new option –bootstrap-server . So the new command would be like: ./bin/kafka-console-consumer.sh –topic testTopic –bootstrap-server localhost:9092…

LightDM is a free, opensource and lightweight X Display Manager for Linux Desktop systems. It is also used as a cross-desktop display manager. It supports various Desktop environments including various display technology, such as Wayland, Mir, and X windowing systems. This tutorial will help you to install the LightDM display manager on the Ubuntu Desktop system. Installing Lightdm on Ubuntu LightDM packages are available under default apt repositories. You can install lightdm on Ubuntu by running the following commands. sudo apt update sudo apt install lightdm Configure Lightdm as Default Display Manager Once the lightdm is installed on your system.…

The Problem: Today, I launched a new AWS instance with Ubuntu 22.04. The default key provided by AWS is working fine with SSH. But when I attached my personal ssh key to the server and tried to access with FileZilla over SFTP, I got the following error in auth.log. May 10 11:52:58 localhost sshd[57650]: Disconnected from authenticating user ubuntu 203.190.146.202 port 46565 [preauth] May 10 11:52:59 localhost sshd[57652]: userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth] May 10 11:53:00 localhost sshd[57652]: message repeated 3 times: [ userauth_pubkey: key type ssh-rsa not in PubkeyAcceptedAlgorithms [preauth]] May 10 11:53:00 localhost sshd[57652]: error:…

In today’s digital-driven environment, virtualization technologies are indispensable, empowering users to operate multiple operating systems on a single hardware unit. Microsoft’s Hyper-V stands out as a robust virtualization tool, particularly favored for its ability to host virtual machines (VMs) efficiently on Windows Server environments. A frequent hurdle encountered by users operating Ubuntu VMs on Hyper-V is adjusting the screen resolution to match their specific needs. The default settings often do not align with user displays, which can hinder productivity and ease of use. This guide offers a detailed, easy-to-follow procedure on enhancing your Ubuntu VM’s screen resolution within Hyper-V, aimed…

Question – How to find static IP Address of My Ubuntu Desktop system? 2 Ways to find IP Address on Ubuntu 22.04 Desktop and server editions? Ubuntu 22.04 desktop edition comes with an attractive Gnome Desktop Environment. You can either use the command prompt to check the current IP address on your system or use a GUI option to view the local IP address on your system. You can also use another article to change IP address on Ubuntu 22.04 desktop and server editions. Choose one of the below methods to check the current IP address on a Ubuntu system.…