Linux

1. Overview: Linux is a free, open-source operating system based on Unix, created by Linus Torvalds in 1991.
2. Kernel: The core component of Linux is the kernel, which manages the system's hardware and resources.
3. Distributions: There are various Linux distributions (distros) like Ubuntu, Fedora, and Debian, each tailored for different user needs.
4. Open Source: Linux's source code is freely available for anyone to view, modify, and distribute.
5. Security: Known for its robust security features, Linux is widely used in servers and critical systems.
6. Flexibility: Linux can run on a wide range of devices, from smartphones to supercomputers.
7. Community: A strong global community of developers and users continuously improves and supports Linux.
8. Command Line: Linux offers powerful command-line tools for advanced users and system administrators.
9. Graphical Interfaces: It also supports various desktop environments like GNOME, KDE, and Xfce for a user-friendly experience.
10. Applications: Linux supports a vast array of applications, from productivity tools to games.

For more details, you can visit the official Linux website.