An overview of a dozen distros—operating systems running on the Linux kernel

An overview of Linux, from the foundational program to its related operating systems

The Linux kernel, which bridges hardware and software, serves as the basis for many fully customizable operating systems, whose components can be modified or removed to optimize performance or reduce bloat on devices with limited resources. This has made these OSes useful for low-power devices like smart thermostats, as well as for powerful supercomputers that require computational efficiency.

A list of technologies that run on Linux, including those on the International Space Station

Besides the Astrobee robots and computer systems on the ISS, the security and reliability of Linux distros have led to their use by the Federal Aviation Administration, the Pentagon, the Library of Congress, and the New York Stock Exchange. Many of the operating systems found in smart devices, autonomous vehicles, and wearables also run atop the Linux kernel.

The history of Linux, from the UNIX wars to the hundreds of Linux operating systems of today

Amid conflicts over standardizing and controlling various versions of UNIX—an operating system developed at Bell Labs and owned by AT&T—the GNU Project was announced to create a free, open-source OS. Originally designed for Intel's 386 CPU under the name "Freax," Linus Torvalds Linux kernel would be combined with GNU Project software and customized by growing numbers of developers into many OSes, each tailored to specific computing needs.

Linux adoption statistics, including its use in all the world's top 500 supercomputers since 2017

This has been driven by kernel-level customizations available with Linux-based operating systems that improve computational performance and reduce latency. As of 2025, Linux's desktop market share is 3.7%, but 87.8% of machine learning workloads run on Linux infrastructure. The Linux OS market is expected to grow 105.8% through 2029.

Distinguishing between Android and Linux-based operating systems

The Google-owned OS for mobile devices runs atop a Linux-based kernel that manages core services and manages software communication with hardware. While many Linux distributions can often be installed on these devices, Android uses its own standard libraries, user interface, and other open-source software, which comprise the Android Open Source Project.

The origin of Linux-based operating systems and why calling them 'Linux' is controversial

When Linus Torvalds developed the Linux kernel—the foundational layer of an operating system—developers incorporated it into other readily available components of the GNU Project to create complete systems. Although these OSes have been colloquially referred to as "Linux" for simplicity for decades, the GNU Project has long argued that they should be called "GNU/Linux" to honor the project's contributions.

View the codenames given to Linux kernel releases, from 'Woozy Numbat' to 'ninja sloth'

While each version is assigned a code, such as 6.8.0-rc7, animal codenames provide more memorable, fun identities for each version. Some Linux distributions have also adopted this philosophy and have used alliterative nicknames to convey the distro's characteristics, such as Ubuntu's "Warty Warthog," described as "functional if not pretty."

Read Linus Torvalds' commenting on his first posts about Linux in the comp.os.minix newsgroup

On August 1, 1991, he posted a request on what would be the first version of Linux, writing, "I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu) for 386(486) AT clones. [...] I'd like any feedback on things people like/dislike in minix, as my OS resembles it somewhat."

A conversation about open-source software with Linus Torvalds, who invented Linux

Originally written as part of a personal project, Torvalds acknowledges that Linux's growth came from opening it up to a community of users who could each work on different components, including those that were not his strength, such as the user interface. He also admits to being an engineer, rather than a visionary, relating more to Thomas Edison than Nikola Tesla.

Explaining how open source systems like Linux can be secure, despite their public source code

While no computer system is immune to all cyberattacks and malware, the transparency of open-source technology means many thousands of developers can review and oversee the underlying code powering the software on an ongoing basis. This increases the likelihood of catching and patching vulnerabilities more quickly than smaller groups of cybercriminals looking to exploit them.

How a crisis over managing Linux versions led to the foundational software behind GitHub

In 2005, after enduring several challenges with BitKeeper—the system then used to manage the Linux source code—Linus Torvalds spent about 10 days writing code for Git, a new system to organize and track versions throughout kernel development. Git provides distributed version control for GitHub, which, as of 2023, is the world's largest host of software development projects.

The stories behind open-source project logos, including Tux, Linux's penguin mascot

During a trip to an Australian zoo, Linus Torvalds, the developer of the Linux kernel, was bitten by a penguin, which inspired the animal to be selected as the software's logo. The first design was drafted by Larry Ewing while a student at Texas A&M University, and the Tux name—short for tuxedo—aligned with the animal's appearance.

Learn about the Linux contingency plan for when its creator retires or passes away

Authored 34 years after the software was coded by Linus Torvalds, the plan dictates that if the maintainers of the code's repository are unable to facilitate a transition to Torvalds' successor, an Organizer will chair a meeting with the invitees of the most recently concluded Maintainers Summit, which will consider options for the ongoing management of the repository.

Visualize the growth of the Linux kernel source code, which surpassed 40 million lines in 2025

Version 0.01 of the program authored by Linus Torvalds in 1991 spanned approximately 10,000 lines of code and has progressively grown to accommodate the management of an increasing number of hardware and software components. The kernel grows by an estimated 400,000 lines of code every two months.

Explaining computer kernels and what makes monolithic kernels different from microkernels

A kernel is an intermediary piece of software on a device that manages the connection between software programs—the services and processes they perform to run correctly—and the available hardware resources, such as memory and computing bandwidth, including prioritizing resource allocation and managing access to specific hardware. A monolithic kernel manages all of an operating system's services, whereas a microkernel only handles essential services.

Cryptocurrency wallets for beginners

Cryptocurrency wallets come in many types. Here, we present the details, comparing the wallets’ features so that you can choose the best crypto wallet for your needs.

Explore the world of fan fiction

This guide to the genre's major platforms breaks down their strengths and weaknesses, offering an excellent primer for the uninitiated newcomers.

The history of the Linux Foundation, a technology consortium supporting open-source projects

The nonprofit, founded in 2000 by IBM, HP, Intel, and others as the Open Source Development Labs, was established to build the infrastructure needed to scale with the growing development of Linux. Upon merging with the Free Standards Group in 2007, it rebranded as the Linux Foundation and, as of 2024, provides a "neutral home for code and collaboration" to almost 1,000 projects.

How Steve Jobs tried to end development on Linux by offering Linus Torvalds a job

In a 2012 interview, Linus Torvalds claimed that the Apple CEO offered him a job in 2000 to exclusively work on Mac OS's Mach kernel. While Linux has not provided the financial benefits that a business venture with Apple may have, Torvalds stated, "I'm very happy with feeling that I've done the right thing." (Some readers may experience a paywall.)

Explore a visual history of the Windows operating system

Named after the windows that separate different applications, the operating system’s first version came preinstalled with Calculator, Paint, and Reversi. There was no Windows 9 to avoid compatibility issues with legacy code searching for Windows 95 and 98 files via a “windows9” query.

Why the Linux Foundation partnered with the Academy of Motion Picture Arts and Sciences

In founding the Academy Software Foundation in 2018, the Linux Foundation spread its open-source philosophy to the cinema by establishing a neutral forum for sharing animation, visual effects, and audio technologies across projects. Its founding members include DreamWorks Animation, Epic Games, Google Cloud, Intel, and Walt Disney Studios.

A definitive guide to crypto and blockchain

The concept of cryptocurrency emerged more than a decade ago, with a famous whitepaper on bitcoin. To fully understand the rise of bitcoin, Bloomberg’s Matt Levine developed this comprehensive four-part series exploring the broader crypto and blockchain ecosystems, where they came from and how they work (subscription required).

Upgrade cost and compatibility issues have kept Microsoft's legacy systems alive

As of 2025, Windows XP and Windows NT continue to power ATMs and transit systems, while Deutsche Bahn's trains use Windows 3.11 for display systems. Microsoft's continued support for these operating systems helps it maintain its dominance in the business sector.

An overview of 12 fundamental types of algorithms and the uses for each

These include search algorithms to quickly process and find important information, cryptographic algorithms to secure communications, randomized algorithms—such as Monte Carlo simulations for estimating probabilities of outcomes—and greedy algorithms, which make optimal choices based on available data in a step-by-step fashion, as seen in navigation apps.

The industries ripe for disruption by blockchain and cryptocurrencies

Blockchain—what is it good for? Lots of things, it would seem. Peruse this guide from The Motley Fool site and learn about different applications and use cases for blockchain technology. Financial exchanges, real estate, insurance, voting, an gambling are just a few of the 15 applications discussed here.

Creating malware requires more than knowledge of programming languages

Because computer viruses, worms, and other malicious software reside within a computer's operating system, which manages computer hardware and software, cybercriminals writing effective malicious code must understand how the OS manages input and output, permissions, memory, etc. Knowledge of credentials and network access also helps create malware that easily spreads.

The 10 most important (other) cryptocurrencies

Bitcoin has not only been a trendsetter, ushering in a wave of cryptocurrencies built on a decentralized peer-to-peer network, but has also become the de facto standard for cryptocurrencies. But it's not the only one. Here are some cryptocurrencies that have held on throughout steep price climbs and nosedives.

Everything you need to know about Mars

The Lunar and Planetary Institute provides assorted resources about the red planet, Mars. Review this basic 101 level introduction and get to know our solar system neighbor. Learn about Mars' planet-wide dust storms, staggeringly high mountains (six of which dwarf Mount Everest), and whether there's water there below the surface.

Ethereum is a blockchain-powered operating system known for its cryptocurrency, ether

Ethereum's underlying blockchain allows developers to build decentralized applications (dApps) that leverage smart contracts to seamlessly run decentralized financial tools (crypto wallets, exchanges, marketplaces, and more), along with Web3 concepts like non-fungible tokens.

Explore an online gallery highlighting the importance of graphical user interfaces

Before the Macintosh, computers were primarily used in offices and required users to type complex commands to perform tasks. Apple followed the device with the LaserWriter printer, bringing graphic production to at-home artists and designers.

Drugs 101: An interactive guide

What's the difference between opioids and psychedelics? This guide details specific drugs and their various associated effects. Drugs in this wheel fall into seven categories: stimulants, depressants, empathogens, psychedelics, dissociatives, cannabinoids, and opioids.

A guide to what you need to get started in VR

From Oculus Rift to Google Daydream, VR is getting plenty of hype. But what system should you buy? And what should you play?

With many smaller computing cores, graphics processing units process many identical tasks in parallel, whereas central processing units have fewer, larger cores built to handle a wide variety of more complex tasks sequentially.

A timeline of computer history

The earliest computers bear little resemblance to the computing devices that most people rely on today. This timeline graphic from the Computer History Museum tracks their evolution, from the early days of bulky mainframes that only experts generally used through to the personal computing revolution and on to the modern mobile era. Readers will learn important context ahead of the next major computing platform shift.

OSINT: How hackers find their marks

What is OSINT? How do hackers gather intel about targets? Just how much can they learn about you? Learn more as we dig in to the world of OSINT.

Bitcoin explained and made simple

Bitcoin, the most popular and well-known example of a cryptocurrency, came on the scene around 2010, with its evangelists proclaiming it would eventually displace government-backed traditional cash. While the concept of a digital currency may seem straightforward, the details can be deceptively simple. This quick video overview provides the foundation for a deeper dive into the world of decentralized currency.

The dark web can expose anonymous users to potentially dangerous environments

Browsing the dark web requires onion routing, which prevents visitors from being identified and the locations from which they connect from being traced. This has been useful to activists in environments affected by political oppression or instability. However, those unfamiliar with navigating the space may encounter malware and network attacks from denizen hackers.

View a library of custom programs that can be loaded onto graphing calculators, including productivity tools, reference materials, games, and interactive applications, such as prom proposals.

Operas can be serious, comedic, or both

Opera is a complex art form that includes a range of genres. The most commonly presented types are opera seria, opera buffa, opera semiseria, opéra comique, and grand opéra. Each genre varies in its philosophy and approach, with differences in subject matter, tone, and display.

Explore graphics processing unit benchmarks for 2026, led in performance by Nvidia's GeForce RTX 5090, with AMD's Radeon RX 9060 XT 8GB and Nvidia's GeForce RTX 5060 providing the best 1080p performance per dollar.

Different types of malware are categorized by how they spread or operate

Computer viruses require user interaction to execute a file and spread, whereas worms can self-replicate across systems without human intervention. Ransomware locks systems until a key is provided, spyware tracks and reports user activity to a third party, and trojans disguise various types of malware as legitimate software.

Browse and explore dozens of major psychology theories

There are a ton of different psych theories—so here's a breakdown of some of the major ones according to the general psychological focus.

When buying a custom computer, selecting integrated graphics is more affordable, but a dedicated graphics card should be considered for CAD, video content creation, high-end gaming, and 3D modeling.

Explore the countries with a federal system—and see how they work

This resource from the Forum of Federations catalogs the world's federal countries. It provides background information on each, including the emergence of federalism, the division of power, and the practical interaction between national and regional governments.

Explore an emulated demo of Windows 95 Microsoft Plus to try your hand at Solitaire, 3D Pinball Space Cadet, and other classic Windows applications.

The benefits of cryptocurrency and blockchain technology

At the root of cryptocurrencies' allure is blockchain technology, an innovation bringing profound transformations to industries, especially the financial industry. This simple article breaks down the difference between cryptocurrencies and blockchain as well as the benefits of each.

Bitcoin, the oldest and most popular cryptocurrency, is a digital cash alternative introduced in 2009 that rapidly grew in popularity and now boasts a global user base.

A database of grape varieties

All wines are defined in part by the type of grapes used, whether a single grape or a blend. This encyclopedic archive of grape varieties and their respective attributes is an easy way to become acquainted with just about any wine grape out there—from Albariño to Zweigelt. It also includes brief introductions to non-wine alcoholic beverage categories like beer and hard seltzer.

Ethereum is a blockchain-powered platform for building decentralized software and apps

Among crypto enthusiasts, ethereum is known for the cryptocurrency it uses to facilitate transactions: ether, or ETH. It's often compared to an app store. The underpinnings of ethereum's blockchain include dApps, which operate using automated scripts called "smart contracts."

An overview of extremophiles and the biochemical adaptations employed by various types

These organisms thrive in environments that would normally be inhospitable to most living things by using molecules that help counter deadly environmental factors. These include antifreeze-like proteins that prevent psychrophiles from freezing and rupturing in polar regions, and osmoprotectants that prevent some extremophiles from losing water to salty environments.