Даже ссылку на ВиКи давать не буду ...
Цитата
Linux (Listeni/ˈlɪnəks/ lin-uks[5][6] or, less frequently used, /ˈlaɪnəks/ lyn-uks)[6][7] is a Unix-like and mostly POSIX-compliant[8] computer operating system assembled under the model of free and open-source software development and distribution. The defining component of Linux is the Linux kernel
Linux's greatest success in the consumer market is perhaps the mobile device market, with Android being one of the most prominent OSes among smartphones, tablets and recently wearable technology.
