What is Shell, Shell type & Shell script ?

What is a Shell?

·         User interface to AIX/UNIX/LINUX

·         Command interpreter

·         Programming language

Shells Type:

There are lot of shell types, some are listed here

Korn(88)                       - ksh

Korn (93)                      - ksh93

Bourne                          - bsh

bash                              - bash

Restricted                      - Rsh

C                                  - csh

Trusted                         - tsh

POSIX                            - psh

Default                          - sh

Remote                         - rsh

What Is a Shell Script?

·         A readable text file which can be edited with a text editor

-- /usr/bin/vi shell_prog

·         Anything that you can do from the Shell prompt

·         A program, containing:

-- System commands

-- Variable assignments

-- Flow control syntax

-- Shell commands

·         And Comments !

njoy the simplicity.......
Atul Singh