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<p><b>New page</b></p><div>{{clear}}== Shell ==<br />
A '''shell''' is a user interface for access to an [[operating system]]'s services. 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 an outer layer of interface between the user and the innards of the operating system (the kernel).<br />
== Types of Shells ==<br />
=== Command-Line Interface (CLI) ===<br />
A [[command-line interface]] (CLI) is a text-based user interface used to view and manage computer files. Examples of CLI shells include the [[Bourne shell]] (sh), the [[C shell]] (csh), the [[Korn shell]] (ksh), and the [[Bash (Unix shell)|Bourne Again shell]] (bash).<br />
=== Graphical User Interface (GUI) ===<br />
A [[graphical user interface]] (GUI) shell provides a graphical means of interacting with the operating system. Examples include the [[Windows Shell]], the [[GNOME]] Shell, and the [[KDE Plasma]] Shell.<br />
== Functions of a Shell ==<br />
Shells provide several functions, including:<br />
* Command interpretation: Interpreting and executing user commands.<br />
* Scripting: Writing and executing scripts to automate tasks.<br />
* Job control: Managing multiple tasks within a single shell session.<br />
* File manipulation: Navigating and manipulating the file system.<br />
== Popular Shells ==<br />
* [[Bourne shell]] (sh)<br />
* [[C shell]] (csh)<br />
* [[Korn shell]] (ksh)<br />
* [[Bash (Unix shell)|Bourne Again shell]] (bash)<br />
* [[Z shell]] (zsh)<br />
* [[fish (Unix shell)|Friendly Interactive Shell]] (fish)<br />
== Shell Scripting ==<br />
[[Shell scripting]] is writing a series of commands for the shell to execute. It is commonly used for task automation, program execution, and file manipulation. Shell scripts are typically written in a text editor and saved with a .sh extension.<br />
== Related Pages ==<br />
* [[Operating system]]<br />
* [[Command-line interface]]<br />
* [[Graphical user interface]]<br />
* [[Bourne shell]]<br />
* [[C shell]]<br />
* [[Korn shell]]<br />
* [[Bash (Unix shell)]]<br />
* [[Z shell]]<br />
* [[fish (Unix shell)]]<br />
* [[Shell scripting]]<br />
[[Category:Operating system technology]]<br />
[[Category:User interfaces]]<br />
[[Category:Command shells]]<br />
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