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Software & Coding Articles
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Differentiate between process switch and mode switch in OS
A process is defined as a program in execution and an entity that represents the basic unit of work to be implemented in the system. Understanding the difference between process switch and mode switch is crucial for comprehending how operating systems manage CPU resources and maintain system security. Process Switch A process switch (also called context switch) occurs when the processor switches from one thread/process to another thread or process. It involves saving the contents of CPU registers and instruction pointer for the current process. For the new task, the registers and instruction pointer are loaded into ...
Read MoreWhat are different types of interrupts?
An interrupt is a signal from a device attached to a computer or from a program within the computer that requires the operating system to stop and figure out what to do next. Interrupts allow the system to respond immediately to important events without constantly checking for them. When the CPU processes programs and needs any I/O operation, the interrupt mechanism prevents the CPU from remaining idle while waiting for I/O completion. Instead of continuously polling devices, the CPU can work on other tasks and respond only when an interrupt signals that an operation is ready. How Processor ...
Read MoreWhat are Virtual Machines in Operating System?
A virtual machine (VM) is a virtual environment that functions as a complete computer system with its own CPU, memory, network interface, and storage, created on a physical hardware system. VMs are isolated from each other, and multiple VMs can exist on a single piece of hardware, like a server. Each virtual machine runs as a simulated image of application software and operating system on a host computer. It has its own operating system and software that facilitates resource allocation to virtual computers through a layer called the hypervisor. How Virtual Machines Work Virtual machines operate through ...
Read MoreWhat is a distributed Operating System?
Distributed Operating System is a type of operating system model where applications run on multiple interconnected computers that appear as a single unified system to users. It extends beyond network operating systems by providing higher levels of communication, integration, and resource sharing across distributed machines. A distributed OS runs on multiple CPUs across different physical locations, but presents itself to end-users as an ordinary centralized system. It enables seamless sharing of resources like CPU, disk storage, network interfaces, and processing nodes across multiple sites, effectively increasing the total computational capacity and data availability of the entire system. Architecture ...
Read MoreHow does the operating system act as a resource manager and extended machine?
An operating system is the interface between the user and the machine which controls and coordinates the use of the hardware among the various application programs for the various users. The OS serves two fundamental roles: as an extended machine that provides abstraction, and as a resource manager that efficiently allocates system resources. Operating System as Extended Machine The operating system acts as an extended machine by providing a layer of abstraction that hides the complexity of hardware from programmers and users. Key Features of Extended Machine At the machine level, a computer's structure is ...
Read MoreLinux Package Management with Aptitude
Aptitude is a text-based front-end for APT (Advanced Package Tool) built on the Ncurses library, designed for Debian-based systems. It provides an interactive interface for package management and runs from the terminal or command line interface. This article explains Linux Package Management with Aptitude and APT commands. What is APT APT is a command-line package manager that provides commands for searching, managing, and querying information about packages. It offers the same functionality as specialized APT tools like apt-get and apt-cache, but with options more suitable for interactive use by default. To get more information about APT, use ...
Read MoreMicrosoft's Surface Studio for Creative Professionals
Microsoft's Surface Studio is an elegant all-in-one desktop PC with a built-in touchscreen specifically designed for creative professionals. Microsoft's journey began with PixelSense (formerly called Microsoft Surface) in 2008, followed by the Surface tablet and Surface Book. The Surface Studio represents the latest evolution in this product line. The Studio features a 28-inch display mounted on innovative "zero gravity" hinges that allow it to function as a traditional monitor or tilt down into a drafting table configuration. This versatile design positions Microsoft's Studio as a direct competitor to Apple's iMac and Mac Pro systems. Key Features The ...
Read MoreThe Best Linux based OS Distributions in 2016
This article helps you understand the key features of Linux operating systems to choose the right distribution for your environment. The year 2016 marked a crucial period for Linux, especially in enterprise-level and consumer segments. As Linux has evolved significantly over the past two decades, various distributions now cater to specific use cases and requirements. Free/Open Source Server Distributions Debian and CentOS For server deployments requiring free or open-source solutions without subscription fees (unlike RHEL or SLE), Debian and CentOS are excellent choices. These community-based distributions offer high standards for server environments with long-term support, eliminating concerns ...
Read MoreRainbow Stream – An Advanced Command-line Twitter Client for Linux
Rainbow Stream is a free and open-source Twitter client for Linux command-line, released under MIT License. It is capable of showing real-time tweet streams, composing tweets, searching, favoriting, and more. It is written in Python and built on top of Twitter API and Python Twitter Tool. To run this application in your console you must have installed Python and pip version 2.7.x or 3.x. Features Free and open-source Twitter client for Linux command-line Capable of rendering Twitter images in terminal Supports proxy connections Interactive mode support Theme customization capabilities Real-time Twitter stream display Tweet, search, and favorite ...
Read MoreHow to Install and Configure Nginx on Ubuntu 16.04
Nginx is a high-performance web server and reverse proxy server that powers many of the world's busiest websites. It is known for its stability, rich feature set, simple configuration, and low resource consumption. This guide covers installing and configuring Nginx on Ubuntu 16.04. Prerequisites Before starting, ensure you have: Ubuntu 16.04 installed on your machine A non-root user with sudo privileges Internet connection for package installation Installing Nginx Nginx is available in Ubuntu's default repository, making installation straightforward using the apt package manager. Update Package Repository First, update your system's package ...
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