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Finding your IP address on Ubuntu can be crucial for various networking tasks, such as setting up a server, troubleshooting connectivity issues, or simply ensuring your network’s security. Ubuntu, with its powerful command-line interface and graphical user interface options, offers multiple methods to discover your machine’s IP address. Whether you’re a seasoned system administrator or a curious novice, understanding how to locate your IP address is a valuable skill in the digital age. Keep in mind that your internal IP address is different from your system’s external IP.

Encountering an error stating “the requested NGINX plugin does not appear to be installed” can be a stumbling block when setting up or configuring your web server. This issue often arises during the installation of Let’s Encrypt SSL certificates using Certbot or when configuring certain modules within NGINX. Fortunately, with a systematic approach, this problem can be resolved efficiently.

In an ambitious shift towards digital sovereignty, Schleswig-Holstein has set a notable precedent within Germany by initiating a large-scale transition from proprietary software to open-source alternatives. The German state's move signifies a broader commitment to independence, security, and sustainability in digital government operations.

Network connectivity issues can be a common frustration for users of Ubuntu Linux. Whether you’re dealing with slow internet speeds, connection dropouts, or changes in network configuration, restarting your network services can often be a quick and effective solution. This guide will walk you through several methods to restart your network on Ubuntu Linux, ensuring you can get back online with minimal disruption.

A critical warning was issued by the Cybersecurity and Infrastructure Security Agency (CISA) regarding the discovery of a hidden backdoor within a commonly utilized Linux utility. This utility, known for its file compression and encryption capabilities, serves as an essential tool for sharing files securely between systems.

Securing remote server access is paramount for system administrators and developers. While it’s common practice to disable root login over SSH due to security concerns, there are scenarios where enabling it is necessary, such as when managing a remote server without a user account or for specific administrative tasks. This article guides you through enabling SSH root login on Ubuntu or Debian Linux servers or desktops, ensuring you can access your system with the necessary precautions.

An intrusion detection system (IDS) is an important security tool for system administrators. Its purpose is to notify us whenever it detects that a potential intrusion has occurred. When an attacker compromises a system, one of the first things they will usually do is attempt to change file permissions, attempt to escalate to the root user account, or start modifying system files. The IDS is configured to monitor for these changes and make us aware of them if they occur.

There are a plethora of tools available for the Raspberry Pi that system administrators can use to monitor network traffic. Newer Raspberry Pi models even come with a built in WiFi chip in addition to the traditional Ethernet port, giving us even more options for connecting to networks and monitoring traffic. Network monitoring can be useful for troubleshooting connectivity problems or identifying bottlenecks that are slowing down connections.

In this tutorial, we will go over various tools that can be used to monitor the network traffic on a Raspberry Pi. Along with default utilities on Raspberry Pi OS, additional packet sniffing and network analyzer tools such as Wireshark can be installed and used to gather information on network traffic. Let’s see how to use them.

The AVIF (AV1 Image File Format) is gaining popularity for its impressive compression capabilities without sacrificing image quality, making it a preferred choice for web developers and photographers alike. This guide explores various methods to convert images to AVIF format on Linux, enabling users to leverage this advanced image format’s benefits.

Java is a powerful programming language and computing platform first released by Sun Microsystems in 1995. Over the years, it has become indispensable for developing everything from mobile applications to large-scale enterprise systems. Installing Java on Ubuntu, a popular Linux distribution, is a straightforward process that can be accomplished through various methods. This tutorial aims to guide you through the installation of Java on Ubuntu, covering both the installation from the Ubuntu repository and the official Oracle package.

AppImage is a format for distributing portable software on Linux without needing superuser permissions to install the application. It allows developers to package desktop applications in a way that they can run on various Linux distributions. This tutorial demonstrates how to build a basic “Hello World” AppImage, providing a straightforward example of how to bundle and distribute software in the Linux ecosystem.

Removing snapd from Ubuntu can be an essential step for users who prefer a leaner system or wish to rely exclusively on traditional package management tools like APT. Snap packages and the Snap package manager offer a convenient way to distribute and install applications across various Linux distributions. However, not everyone finds the additional layer beneficial, leading some to opt for its removal. This guide provides a comprehensive walkthrough for safely removing snapd and its associated packages from your Ubuntu system.

Although it is not a common error, some users may encounter a black screen when using a Raspberry Pi. The error is most likely to occur when first booting the Raspberry Pi, giving users very little opportunity to perform any kind of investigation into the problem for troubleshooting. In this tutorial, we will look at some ways to solve the black screen problem that occurs when booting a Raspberry Pi. This will include a few different methods, as the exact cause can vary and sometimes be hard to pinpoint.

Distrobox is a free and open source tool which allows us to integrate the userlands of Linux distributions. Under the hood it uses Docker or Podman to create containers, and integrates them with the host by sharing access to the graphical server, the user HOME directory and USB devices. In this tutorial we see how to install and use Distrobox on the most used Linux distributions.

When troubleshooting system issues in Ubuntu Linux, the best way to get started is by perusing the system logs. Basically every system event is logged somewhere. This includes kernel messages, service status messages, and almost anything else you can imagine. It is not uncommon for system logs to quickly fill up with millions of entries over a short period of time. With all this information available, we just need to know how to find what we are looking for, and then can quickly pinpoint the culprit of pesky system issues in Ubuntu.

This article provides a comprehensive guide on how to monitor the usage of NVIDIA graphics cards on Ubuntu. Whether you are a gamer, a professional in graphics-intensive applications, or someone interested in the performance of machine learning models, understanding how to check your NVIDIA GPU’s usage can be crucial. We will cover two primary methods to accomplish this, each with its own set of advantages.

Installing the right NVIDIA drivers on your Ubuntu 24.04 system is crucial for optimizing your graphics card’s performance. Whether you’re gaming, designing, or using graphic-intensive applications, the proper driver can make a significant difference. This guide covers four methods to install NVIDIA drivers, ensuring compatibility and enhancing your system’s graphics capabilities.

When using QEMU/KVM, there are many methods to share data between the host system and guest virtual machines. In this tutorial, we focus on creating a filesystem passthrough, using virt-manager or by manually editing a virtual machine definition, and we learn how to mount a host directory inside a virtualized guest.

Dmenu is a dynamic menu for X often used on minimal window managers setups. It is part of the suckless tools suite of free and open source utilities created by the suckless.org project, which include, among the others, the dwm window manager and the st terminal emulator. In this tutorial we see how to install dmenu on the most used Linux distributions, and how to create custom dmenu scripts.

Batocera is a free and open source Linux distribution designed to create retrogaming consoles out of a vast selection of devices. It supports a variety of platforms and architectures, from Intel-based computers to Raspberry Pi boards and handheld consoles, and works as a central control panel for all the best console emulators.In this tutorial we learn how to flash Batocera Linux on a USB stick and create a portable retrogaming device.