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"Article" (PDF). Comparing Bash with the Windows Vista shell: Shell Games. Linux Magazine. Archived (PDF) from the original on 2014-10-10. "Shell and Utilities". IEEE Standard for Information Technology 1003.1™-2024 – Portable Operating System Interface POSIX™.1-2024 — The Open Group Base Specifications Issue 8 (2024 ed.). The IEEE and ...
However, several major versions of Unix existed—so there was a need to develop a common-denominator system. The POSIX specifications for Unix-like operating systems originally consisted of a single document for the core programming interface, but eventually grew to 19 separate documents (POSIX.1, POSIX.2, etc.). [8]
Utilities listed in POSIX.1-2017 This is a list of POSIX (Portable Operating System Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating systems and most Unix-like operating systems.
m4 is a general-purpose macro processor included in most Unix-like operating systems, and is a component of the POSIX standard. The language was designed by Brian Kernighan and Dennis Ritchie for the original versions of UNIX. It is an extension of an earlier macro processor, m3, written by Ritchie for an unknown AP-3 minicomputer. [1]
A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language , and is used by the operating system to control the execution of the system using shell scripts .
Linux distributions that have highly modified kernels — for example, real-time computing kernels — should be listed separately. There are also a wide variety of minor BSD operating systems, many of which can be found at comparison of BSD operating systems .
Portable source code had to contain a significant amount of conditional compilation to accommodate the differences across software platforms, even though they were all notionally Unix. [33] The POSIX standard replaces the ioctl() system entirely, with a set of library functions (which, of course, may be implemented under the covers via platform ...
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