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Bash is a free software shell program and command language for Unix-like operating systems, developed by Brian Fox for the GNU Project. It supports interactive and non-interactive modes, shell scripts, various features and extensions, and is widely used as the default login shell for Linux distributions and macOS.
A Unix shell is a program that executes other programs in response to text commands and provides a command line user interface for Unix-like operating systems. Learn about the history, features and types of Unix shells, such as sh, csh, bash, zsh and more.
This web page lists the utilities specified by POSIX, a standard for Unix-like operating systems. It includes the description and history of each utility, such as mkdir, which creates directories.
Command-line completion in Bash. Completion features assist the user in typing commands at the command line, by looking for and suggesting matching words for incomplete ones. Completion is generally requested by pressing the completion key (often the Tab ↹ key). Command name completion is the completion of the name of a command.
Learn what a shell is in computing, how it exposes an operating system's services to a user or other programs, and how it can be command-line or graphical. Explore the history of shells from Multics to Unix to Windows, and the features and examples of different shells.
A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. Learn how to write shell scripts for various purposes, such as file manipulation, program execution, and printing text, and how to use shell features like loops, tests, variables, and subroutines.
Z shell (Zsh) is a Unix shell created by Paul Falstad in 1990 while he was a student at Princeton University. It combines features from both ksh and tcsh, offering functionality such as programmable command-line completion, extended file globbing, improved variable/array handling, and themeable prompts.
Learn about the basic file, shell and text manipulation utilities from the GNU Core Utilities for Unix environments. See the list of commands, their names, descriptions and examples.