Qué (quién) es shell command - definición
![Bash]], a widely adopted [[Unix shell]]](https://commons.wikimedia.org/wiki/Special:FilePath/Bash demo.png?width=200 "Bash]], a widely adopted [[Unix shell]]")
![Command Prompt]], a CLI shell in Windows](https://commons.wikimedia.org/wiki/Special:FilePath/Dir command in Windows Command Prompt.png?width=200 "Command Prompt]], a CLI shell in Windows")
![[[Drag and drop]] operation performed on a group of files between [[KDesktop]] and [[Konqueror]] in [[KDE]]](https://commons.wikimedia.org/wiki/Special:FilePath/Drag-and-drop-en.svg?width=200 "[[Drag and drop]] operation performed on a group of files between [[KDesktop]] and [[Konqueror]] in [[KDE]]")
Wikipedia
In computing, a shell is a computer program that exposes an operating system's services to a human user or other programs. In general, operating system shells use either a command-line interface (CLI) or graphical user interface (GUI), depending on a computer's role and particular operation. It is named a shell because it is the outermost layer around the operating system.
Command-line shells require the user to be familiar with commands and their calling syntax, and to understand concepts about the shell-specific scripting language (for example, bash), while graphical shells place a low burden on beginning computer users and are characterized as being easy to use, yet most GUI-enabled operating systems also provide CLI shells, normally for performing advanced tasks.
