[Nottingham]Web server questions

[Joshua Lock]

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Good afternoon the list,

I wonder if anyone might be able to help me out or at least point me in 
the right direction.
I have some web hosting on a virtual Apache server with Hosting 
Unlimited.
There are a few things I would like to be able to accomplish with my 
web space.
Firstly I want to host two sites on one virtual server.
So for example I would put site1 and site2 folders in my public_html 
folder, the problem would then be I'd like my main domain name to point 
to the one site's folder and a totally different domain to point to the 
second site.
What I'd ideally like to do is have the sites only accessible by the 
domain names assigned to them. I wonder if this is even possible? If so 
how would I go about doing this considering I don't have access to the 
httpd.conf for the server.
Also does anyone know how to stop search engines from indexing certain 
folders?

Sorry to ask so many questions and I hope it makes sense?

Regards,

Joshua Lock
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