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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. [2]
Bash can execute the vast majority of Bourne shell scripts without modification, with the exception of Bourne shell scripts stumbling into fringe syntax behavior interpreted differently in Bash or attempting to run a system command matching a newer Bash builtin, etc. Bash command syntax includes ideas drawn from the Korn Shell (ksh) and the C ...
Editing a FreeBSD shell script for configuring ipfirewall. A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. [1] The various dialects of shell scripts are considered to be command languages.
Screenshot of a sample Bash session in GNOME Terminal 3, Fedora 15 Screenshot of Windows PowerShell 1.0, running on Windows Vista. A command-line interface (CLI) is a means of interacting with a computer program by inputting lines of text called command lines.
BASIC extensions See also References External links Dialects 0–9 1771-DB BASIC Allen-Bradley PLC industrial controller BASIC module; Intel BASIC-52 extended with PLC-specific calls. 64K BASIC Cross-platform, interactive, open-source interpreter for microcomputer BASIC. A ABasiC (Amiga) Relatively limited. Initially provided with Amiga computers by MetaComCo. ABC BASIC designed for the ABC 80 ...
Kernel support for interpreter directives spread to other versions of Unix, and one modern implementation can be seen in the Linux kernel source in fs/binfmt_script.c. [31] This mechanism allows scripts to be used in virtually any context normal compiled programs can be, including as full system programs, and even as interpreters of other scripts.
The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a command interpreter for shell scripting. Zsh is an extended Bourne shell with many improvements, including some features of Bash, ksh, and tcsh. Zsh was created by Paul Falstad in 1990 while he was a student at Princeton University.
As KornShell was initially only available through a proprietary license from AT&T, a number of free and open source alternatives were created. These include pdksh, mksh, Bash, and Z shell. The functionality of the original KornShell, ksh88, was used as a basis for the standard POSIX.2, Shell and Utilities, Command Interpreter (IEEE Std 1003.2 ...