Rails - Feb 2006 - Executing Ruby on Rail On Specific Server!

Hi,
I successfully executes ruby on rail programs with ajax on my local 
computer
with port number as 3000.

Now i want to upload & run this programs online.
How can i?
Is this necessary to install ruby,rail,web-brick server on my online 
server.
what is the url for running online(as 3000 on local).

Please...

Thank you!

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