Unix is a computer operating system which was developed at AT&T Bell Labs in the early 1970s. It is a multi-user, multitasking operating system that forms the basis for several other operating systems, including Linux. Linux is a free, open-source operating system based on Unix. It was developed in 1991 by Linus Torvalds. Linux is a popular operating system for web servers and cloud computing, and has a large user-base of developers and system administrators who customize the system for their own needs.

Unix is a more mature operating system than Linux, with a larger feature set and more stable core. It is more difficult to learn and configure than Linux, and it requires more experience to use effectively. Linux is easier to learn and use, and is more customizable than Unix. It is also more secure and reliable, as it is regularly updated by a community of developers and users.