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If you are asking how to setup Symfony on a hosting, then the easiest method is to use a PaaS where you can quickly launch a server and install Symfony on server using Composer ssh command.
I think a beginner with symfony2 framework should learn the documentation of sensioLabs (www.symfony.com ) and apply step by step. Personally i began like this.
Read the master book they offers and you will find many ways to install and learn you its structure
You will find many ways like composer or download files to your server and set configurations. It has a command lines that do many jobs for you
