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A process is an active program under execution. It includes the program counter, process stack, registers, and program code, making it more comprehensive than just the static program code (text section). A process passes through different states during its execution lifecycle. While these states may vary across operating systems, the fundamental process states are standardized. The diagram below illustrates the common process states and their transitions − Process State Diagram New Ready ... Read More
Both process and thread are fundamental concepts in operating systems that represent independent sequences of execution. The key difference is that processes operate in separate memory spaces, while threads share the same memory space within a process. Understanding the distinction between processes and threads is crucial for system design, performance optimization, and concurrent programming. Let's explore these concepts in detail. What is a Process? A process is an active program in execution − more than just program code. It includes the program counter, process stack, registers, and program code. When a program is executed, the operating system ... Read More
Firefox is a popular web browser used by millions of people worldwide. One of the reasons for its popularity is its vast array of add-ons, which can enhance productivity and improve user experience. In this article, we will explore 25 most used Firefox add-ons to improve productivity in Linux. Essential Security & Privacy Add-ons uBlock Origin uBlock Origin is an open-source ad-blocker that is highly effective at blocking ads and trackers. It uses minimal system resources and is customizable, allowing users to whitelist specific websites or block certain types of content. NoScript NoScript is a ... Read More
Before setting up GOPATH or GOROOT on your local environment, we must verify that Go is correctly installed on your system. Type the following command in your terminal to check the Go installation − go version If it outputs nothing or displays "go: command not found", then you need to first download the Go binary and install it before setting up the GOPATH. When Go is properly installed, the output will look something like this − immukul@192 linux-questions-code % go version go version go1.16.3 darwin/amd64 Understanding GOPATH GOPATH is ... Read More
A debugger program is a software tool that allows developers to execute another program in a controlled environment, examining it line by line. This enables users to identify incorrect code, understand program flow, and see how their program is interpreted by the computer. Debuggers are essential for finding semantic errors that may not be caught during compilation but cause runtime issues. A debugger helps programmers visualize program execution and understand the internal state of their applications. While debuggers may require practice to master, they significantly reduce the time needed to identify and fix program defects, making them indispensable tools ... Read More
Microsoft has introduced the Windows Subsystem for Linux (WSL), which lets users run their favorite Linux distributions directly from Windows 10 without dual-booting or using a virtual machine. This feature bridges the gap between Windows and Linux environments, allowing developers and system administrators to use Linux tools natively on Windows. Limitations of Windows Subsystem for Linux While WSL is a significant step forward for Microsoft, it has some limitations in terms of full functionality. Specifically, WSL does not support AF_PACKET due to security restrictions. This means you won't be able to put a Wi-Fi adapter in promiscuous mode ... Read More
Swap space is a designated area on storage devices that the Linux kernel uses to temporarily store data when the system's RAM (Random Access Memory) becomes full. When physical memory is exhausted, the operating system transfers the least-recently-used pages from RAM to swap space, freeing up memory for active processes. This virtual memory mechanism ensures system stability and prevents out-of-memory errors. How Swap Space Works The Linux kernel uses a page replacement algorithm to determine which memory pages should be moved to swap when RAM becomes scarce. When a process needs access to swapped data, the kernel performs ... Read More
The Linux find command is a powerful utility that enables you to search for files and directories on your system. The command searches for files and directories based on various criteria, including file name, type, size, date modified, ownership, and permissions, among others. This article provides 25 practical examples of how to use the Linux find command to search for files and directories based on specific criteria. Each example demonstrates real-world scenarios that system administrators and users encounter daily. Basic File and Directory Search 1. Find Files by Name The simplest way to use the Linux ... Read More
A distributed operating system manages resources across multiple networked computers. The file model in such systems defines how files are created, stored, accessed, and managed across the network. This involves complex considerations including file systems, data consistency, fault tolerance, and security. Understanding distributed file models is crucial for building scalable, reliable systems that can handle large amounts of data across multiple machines. Basic Concepts of File Model in Distributed Operating System File A file is a named collection of related data stored on storage devices such as hard drives, flash drives, or network storage. Files have characteristics ... Read More
As the amount of data we generate continues to increase, finding a reliable and cost-effective way to store it has become increasingly important. Cloud storage software is a great solution for this need, allowing users to store data remotely and access it from anywhere with an internet connection. For Linux users, there are a variety of options available, including open source software. Open source software is a type of software that is freely available to use, modify, and distribute. It is often created and maintained by a community of developers and users, rather than a single company. This can ... Read More