This is a list of the shell commands of the most recent version of the Portable Operating System Interface (POSIX) IEEE Std 1003.1-2024 which is part of the Single UNIX Specification (SUS). These commands are implemented in many shells on modern Unix, Unix-like and other operating systems. This list does not cover commands for all versions of Unix and Unix-like shells nor other versions of POSIX.
As is typical in the context of a POSIX system, the term file refers to an item of a file system which can be a regular file, a directory or several other more specialized types.
Columns:
Command: The text one enters to launch the command.
Category: Functional categorization.
Optionality: Indicates whether the command is mandatory or optional in order to achieve conformance. If the latter, then a code indicates the optional functionality group to which the command belongs.
; Batch environment (BE): Batch job control.
; CâÂÂlanguage development (CD): For developing software in C.
; FORTRAN development (FD): For developing software in FORTRAN.
; FORTRAN runtime (FR): RuntimeâÂÂsupport for FORTRAN.
; Software development (SD): For developing software; not language specific.
; User portability (UP): Addresses consistency at the user interface level.
; X/Open System Interfaces (XSI): Historically UNIX-like features that were common on System VâÂÂstyle systems.
Description: Describes what the command does.
First appeared: Identifies an operating system version in which the command was first provided.
See also
References
External links