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Friday, July 06, 2012

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

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