To get started, first you need to create the VM.
git clone [email protected]:alsbury/symfony2nginx.git sf2
cd sf2
By installing the hostsupdater plugin, you don't have to edit the hosts file every time you turn the VM on. This will require you to type an adminsitrator password when you turn the VM on or off. But it makes everything a lot easier if you happen to run more than one Vagrant VM.
vagrant install plugin vagrant-hostsupdater
Then you can launch the VM:
vagrant up
At this point, you should be able to visit http://sf2.debug