What is Linux?
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged in a Linux distribution.
License: GPLv2 and others (the name “Linux” is a trademark)
Initial release date: September 17, 1991
Kernel type: Monolithic kernel
Written in: C, Assembly language
Default user interfaces: Unix shell, KDE Plasma 5, MATE, Cinnamon, Unity, LXDE, Elementary OS, Xfce