1. the structure is like this

   interpreter line (optional)
   commands to be executed.

   but it a language , how can I explain in line. read a tutorial in net. there are many available. search with search engine for that

2. u can get the shell scripting book in pdf format at

   http://www.dur.ac.uk/resources/its/info/…

3. I is not possible to tell u how we can create the shell of the linux for this u hav to study the tutorials on the internet I tell u a site which a lot of stuff regarding this topic
   www.linuxmust.org
4. There is a book named "Unix Shell Programming". Go through that book and you will all basics regarding shell programming and also get some good first hand projects to try on.
5. thats a very broad question since unix is such a huge topic….further more it has several shells all of which have different programming syntaxes …so it would be good if you could let us know what shell you are using so that people can help you with more specific information

Tags: linux kernel development, linux software