Unix and Linux are both operating systems with similar characteristics, but there are key differences between them. Heres a concise comparison:

Unix

• Unix is a proprietary operating system developed by AT&T Bell Labs in the late 1960s.
• It is used in enterprise-level servers and workstations, and is popular in companies, universities, and big enterprises.
• Unix source code is proprietary, and it requires a license to use.
• It is known for its high-performance, multi-tasking-oriented design and can support multiple users on the same machine.

Linux

• Linux is a family of open-source Unix-like operating systems based on the Linux kernel, first released in 1991 by Linus Torvalds.
• It is a free and open-source operating system, and its source code is available to the general public.
• Linux is widely used for computer hardware and software, game development, mainframes, and is the leading operating system on servers.
• Linux distributions support shell scripts, awk, sed, and make, and it is a modular Unix-like operating system.

In summary, Unix is a proprietary operating system with a long history, while Linux is an open-source operating system that has gained widespread popularity due to its flexibility and modularity.