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Scripting languages commonly found on UNIX, Linux, and POSIX-compliant operating system installations include: KornShell (ksh) in several possible versions such as ksh88, Korn Shell '93 and others. The Bourne shell (sh), one of the oldest shells still common in use; The C shell (csh) GNU Bash (bash)
In Linux, if the script was executed by a regular user, the shell would attempt to execute the command rm -rf / as a regular user, and the command would fail. However, if the script was executed by the root user, then the command would likely succeed and the filesystem would be erased. It is recommended to use sudo on a per-command basis instead.
A scripting language or script language is a programming language that is used for scripting. [ 1 ] Originally, scripting was limited to automating an operating system shell and languages were relatively simple.
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]
Mandatory arguments/parameters are arguments/parameters which must be assigned a value upon invocation of the command, function or script file. A shell that can determine ahead of invocation that there are missing mandatory values, can assist the interactive user by prompting for those values instead of letting the command fail.
In 1964, for the Multics operating system, Louis Pouzin conceived the idea of "using commands somehow like a programming language," and coined the term shell to describe it. [9] In a 1965 document, the shell is defined as "a common procedure called automatically by the supervisor whenever a user types in some message at his console, at a time ...
BASIC – actually, many dialects and varieties of a programming language may have commands like kill, system, files, and others which allow operating system access from the interactive and often from programme mode; BeanShell, a shell for Java; F#; J; Haskell; Lisp. Common Lisp Interface Manager
Some popular cross-platform scripting languages are: bash – A Unix shell commonly run on Linux and other modern Unix-like systems, as well as on Windows via the Cygwin POSIX compatibility layer, Git for Windows, or the Windows Subsystem for Linux. Perl – First released in 1987. Used for CGI programming, small system administration tasks ...