Please could some one help me to learn shell scripting. I am not much familiar in programming. Is there any better site/books to learn it.

There's all kinds of info available. A search or two for "bash scripting tutorial" or similar should turn up lots of hits.

But here's my standard list of bash scripting references:
http://mywiki.wooledge.org/BashGuide
http://mywiki.wooledge.org/BashFAQ
http://mywiki.wooledge.org/BashPitfalls
http://wiki.bash-hackers.org/scripting/newbie_traps
http://www.linuxcommand.org/index.php
http://tldp.org/LDP/Bash-Beginners-G...tml/index.html
http://www.tldp.org/LDP/abs/html/index.html
http://www.gnu.org/software/bash/manual/bashref.html
http://wiki.bash-hackers.org/start
http://ss64.com/bash/

Start with the first one, or perhaps linuxcommand.org, and work your way through.

There are certainly quite a few printed books available as well. Again, search is your friend.

BTW, it's usually a good idea to title your threads with something that represents your question more specifically. "Shell scripting" is too vague for anyone to know at a glance what you're asking about.

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