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The command command in Unix and Unix-like operating systems is a utility to execute a command. It is specified in the POSIX standard. It is present in Unix shells as a shell builtin function. The argument(s) passed is a command with its arguments. The passed command is run with the normal shell function lookup suppressed.
Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an SCCS file PWB UNIX df: Filesystem Mandatory Report free disk space Version 1 AT&T UNIX diff: Text processing Mandatory Compare two files; see also cmp Version 5 AT&T UNIX dirname: Filesystem Mandatory
This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. GNU Core Utilities include basic file, shell and text manipulation utilities. Coreutils includes all of the basic command-line tools that are expected in a POSIX system.
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 .
In Unix-like operating systems, true and false are commands whose only function is to always return with a predetermined exit status.Programmers and scripts often use the exit status of a command to assess success (exit status zero) or failure (non-zero) of the command.
Toybox is a free and open-source software implementation of over 200 Unix command line utilities such as ls, cp, and mv.The Toybox project was started in 2006, [3] and became a 0BSD licensed BusyBox alternative.
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The standard shell syntax for anonymous pipes is to list multiple commands, separated by vertical bars ("pipes" in common Unix verbiage): command1 | command2 | command3 For example, to list files in the current directory ( ls ), retain only the lines of ls output containing the string "key" ( grep ), and view the result in a scrolling page ...