Linux is a free operating system developed by Linus Torvalds. It was initially designed to be used on personal computers but has since become widely adopted in businesses, education, and government environments worldwide. Key characteristics of Linux: 1. Free: The source code for Linux software is openly available online, making it easily portable across different hardware platforms. 2. Modular: Linux uses a modular architecture that allows users to customize the operating system without having to install a whole new operating system. 3. Open-source: Linux is licensed under the GNU General Public License (GPL), which means that all software developed with GPL-licensed code can be used, modified, and distributed freely. 4. Free of charge: All modifications made to Linux are free for anyone to copy, distribute, and modify, as long as they do not infringe on copyrights or other intellectual property rights. 5. Multi-platform: Linux is compatible with a wide range of hardware platforms, including desktops, laptops, servers, mobile devices, and embedded systems. 6. Free updates: The Linux kernel remains actively maintained by Linus Torvalds, and frequent security and bug fixes are made available to the community for free. 7. Cross-platform: Linux applications can be developed and deployed on any computer that has an operating system compatible with it, including Windows, macOS, and many other platforms. The popularity of Linux lies in its ability to provide a more flexible and customizable environment than traditional desktop operating systems like Windows or macOS. Its modular nature allows users to build their own customized software environments without the need for extensive learning curves. In summary, Linux is a free operating system that combines the benefits of open-source development with a modular architecture, making it an ideal choice for developers, educators, businesses, and individuals who want to work independently on their computers.