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Articles on Trending Technologies
Technical articles with clear explanations and examples
Docker on Raspberry Pi - Installation Guide
Docker has become an indispensable tool for developers, allowing them to easily create, deploy, and run applications in containers. While Docker is commonly used on desktops and servers, it can also be installed on embedded devices such as the Raspberry Pi. This guide walks through the complete installation process and demonstrates practical usage with examples. Hardware Requirements Docker can run on any Raspberry Pi model, but performance varies significantly. The Raspberry Pi 4 with 4GB or 8GB of RAM provides optimal performance compared to older models like the Pi 3B+. Recommended hardware specifications − Raspberry ...
Read MoreRepeat a Linux Command at a Given Interval
Linux is a powerful operating system that offers a wide range of command-line tools for executing various tasks. One task that often needs to be performed is repeating a command at a given interval. This feature can be useful for several reasons, such as monitoring system performance, running scheduled tasks, and performing automated backups. In this article, we will explore how to repeat a Linux command at a given interval. We will discuss various methods to achieve this, including using the cron utility, watch command, sleep command, and other scheduling tools. Using Cron to Repeat a Command ...
Read MoreHow to Enable PM2 to Auto Start Node.js App at System Boot?
PM2 is a process manager for Node.js applications that provides automatic restart on crashes, multi-application management, and detailed logging. It simplifies Node.js application management by automating common tasks like starting, stopping, and restarting processes while offering real-time performance monitoring capabilities. Enabling auto-start at system boot is critical for production Node.js applications. When servers restart for maintenance or updates, applications must automatically resume without manual intervention to ensure continuous service availability. Installing PM2 Before installing PM2, ensure Node.js is installed by running node -v in your terminal. If not installed, download it from the official Node.js website. ...
Read MoreDOSBox – Runs Old MS-DOS Games_Programs in Linux
DOSBox is a powerful emulator that allows users to run old MS-DOS games and programs on modern Linux systems. It creates a complete DOS environment with sound, graphics, and hardware emulation, making vintage software accessible on contemporary machines. What is DOSBox? DOSBox is an emulator that recreates the MS-DOS operating system environment on modern computers. Released in 2002, it emulates an Intel x86 PC with complete sound, graphics, and networking capabilities. This allows users to run legacy DOS applications exactly as they would on original hardware from the 1980s and 1990s. The emulator is particularly popular among ...
Read MoreDifference Between Terminal, Console, Shell, and Command Line
In the world of computers and operating systems, there are several terms related to the interaction between users and the underlying system. This includes terminal, console, shell, and command line. While they are often used interchangeably, they have distinct meanings and serve different purposes. Understanding these differences is essential for anyone working with operating systems. What is a Terminal? A terminal refers to a device or a program that provides a user interface for interacting with the computer system. Historically, terminals were physical devices such as teletypewriters or computer monitors connected to mainframe systems. Today, terminal emulators are ...
Read MoreWhat are the four main components and the roles of the UNIX OS?
The Unix Operating System is built on four primary components that work together to provide a robust, flexible computing environment. Each component serves a specific role in delivering Unix's characteristic reliability and openness. The Four Main Components Unix OS Components Unix Kernel (Core System) Development Tools General Commands Documentation ...
Read MoreHow to Add Hosts in OpenNMS Monitoring Server
OpenNMS is an open-source network monitoring and management platform that helps system administrators monitor their networks, servers, and applications. It provides comprehensive monitoring capabilities that allow administrators to detect and resolve issues before they become critical. In this article, we'll discuss how to add hosts in OpenNMS monitoring server. What are Hosts? Hosts are the devices or servers that you want to monitor. It could be a physical device or a virtual machine. In OpenNMS, hosts are represented as nodes in the system so that the monitoring system can track them for any issues that may arise. Adding ...
Read MoreHow to Enable RHEL Subscription in RHEL 8?
Red Hat Enterprise Linux (RHEL) 8 is a popular enterprise operating system known for its stability, security, and performance. Released in May 2019, RHEL 8 features a modular architecture allowing users to select specific components based on their needs. A crucial aspect of RHEL 8 is its subscription model, which provides access to software updates, security patches, and technical support. To fully utilize RHEL 8, users must have a valid subscription. Without it, you cannot access critical updates, security patches, or Red Hat's technical support, potentially exposing your system to security vulnerabilities and operational risks. Understanding RHEL Subscription ...
Read MoreHow to Install VMware Player 7.1.2 on Ubuntu/Linux Mint
VMware Workstation Player is a streamlined desktop virtualization application that runs one or more operating systems on the same computer without rebooting. Using VMware, we can easily interact and exchange data between applications running on the virtual machine and the desktop. It supports hundreds of guest operating systems whether they may be new or old. This article describes how to install VMware Player 7.1.2 on Ubuntu and Linux Mint systems. Prerequisites Before installing VMware Player, you need to install the Linux essential headers and build tools. These are required for compiling kernel modules that VMware uses. ...
Read MoreRecursively List All Files in a Directory Including Symlinks
When managing files and directories in any operating system, being able to list all files in a directory is an essential task. However, it becomes more complex when you need to recursively traverse subdirectories and include symbolic links (symlinks). This is particularly important for system administrators and developers working with large, complex file systems where understanding the complete directory structure, including linked files, is crucial. What is a Symlink? A symlink (symbolic link or soft link) is a special type of file that acts as a pointer to another file or directory. It provides a way to create ...
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