Linux commands

1.1 What is a command shell?

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A program that interprets commands

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in programs called

Allows a user to execute commands by typing them manually at a terminal, or automaticallyshell scripts.

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commands.

A shell is not an operating system. It is a way to interface with the operating system and run

1.2 What is BASH?

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BASH = Bourne Again SHell

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originally written by Steve Bourne for UNIX systems.

Bash is a shell written as a free replacement to the standard Bourne Shell (/bin/sh)

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program with and use from the command line.

It has all of the features of the original Bourne Shell, plus additions that make it easier to􀀀
DOWNLOADSince it is Free Software, it has been adopted as the default shell on most Linux systems