some helpful links in shell scripting !!

http://sayle.net/book/

http://www.cyberciti.biz/howto/question/general/compress-file-unix-linux-cheat-sheet.php

http://www.ss64.com/bash/test.html

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Regards
Agnello Dsouza
www.linux-vashi.blogspot.com
www.bible-study-india.blogspot.com