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Linux is a Unix-like operating system family built on the Linux kernel and released in many variants called distributions (distros).
Linux is a family of free and open-source, Unix-like operating systems built on the Linux kernel. First released in 1991 by Linus Torvalds, it is distributed in many forms, often as Linux distributions (distros) that bundle the kernel with supporting system software and libraries from multiple projects (commonly including GNU components). While Linux was originally designed as a Unix clone, it is not identical to Unix; instead, it is a fresh re-implementation that follows Unix-like and POSIX-style interfaces. The “Unix-like family” refers to operating systems that share key concepts and standards associated with Unix (such as POSIX compatibility and typical Unix system behavior). Linux is influenced by Unix and Minix, and its ecosystem includes common Unix-style components like shells, package managers, init systems, and display servers. Not all Linux-based systems are considered distros (for example, Android is Linux-kernel-based but packaged differently), and there is also naming controversy around whether the term “GNU/Linux” should be used to emphasize GNU userland contributions.
Linux is a Unix-like operating system family built on the Linux kernel and released in many variants called distributions (distros).
Linux distributions typically combine the kernel with userland and system software (often GNU, plus other projects) to form a complete operating system.
Linux is influenced by Unix and Minix and follows Unix/POSIX-style standards, but it is a fresh re-implementation rather than original Unix code.
A family of free and open-source Unix-like operating systems based on the Linux kernel.
The core monolithic kernel at the heart of Linux-based operating systems that provides system call and hardware management services.
An operating system that behaves like Unix and follows related standards and architectural concepts, such as POSIX interfaces.
A packaged Linux-based operating system that includes the Linux kernel plus supporting system software, libraries, and tools.
A naming convention recommended by the Free Software Foundation to emphasize the importance of GNU userland components in many Linux distributions.
A family of standards that define portable operating system interfaces commonly used by Unix-like systems.
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