What is posix in Linux?

What is the abbreviation of posix?

Portable operating system interface (English: Portable Operating System Interface, abbreviated as POSIX) is the general name of a series of interrelated standards defined by IEEE to run software on various UNIX operating systems, which is officially called IEEE Std 1003, while the international standard name is ISO/IEC 9945. This standard stems from a project that began around 1985. The name POSIX is an easy-to-remember name proposed by Richard RMS at the request of IEEE. It is basically an acronym for Portable Operating System Interface (Portable operating system Interface), while X indicates its inheritance from Unix API.

Brief introduction

Linux basically gradually achieved POSIX compatibility, but did not participate in the formal POSIX certification.

Microsoft's Windows NT claims to partially implement the POSIX standard.

The current POSIX is mainly divided into four parts: Base Definitions, System Interfaces, Shell and Utilities and Rationale.

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