Since Linux is free, users do not have to pay licensing fees to use it nor are they forced to upgrade their systems. It is modeled after UNIX; it was designed to run like UNIX, but has the original source code. Linux is developed by the community through open source. People collaborate and share code through online forums, while Linus Torvalds oversees development. UNIX, on the other hand, is developed by commercial vendors such as Oracle, IBM, HP, and Apple. Linux was developed for everyone to use, while UNIX was developed primarily for mainframes, servers, and workstations. Linux can be installed on computers, supercomputers, mainframes, phones, tablets and game consoles. UNIX is used in Internet servers, workstations, and PCs. Since Linux is monitored by a community, threats are detected and resolved quickly, while UNIX threats take some time