Setup AWS linux to have a LAMP stack (folder permissions and drush) Part 2. Once this is done you can clone your drupal code in to /var/www/html, setup your database and you should be ready to go

aws_lamp_drupal_kickstart_pt2.sh

#!/bin/bash
## fix the folder permissions for the html directory
sudo chown -R root:www /var/www
sudo chmod 2775 /var/www
find /var/www -type d -exec sudo chmod 2775 {} +
find /var/www -type f -exec sudo chmod 0664 {} +

## install drush
sudo pear channel-discover pear.drush.org
sudo pear install drush/drush-5.9.0
wget http://download.pear.php.net/package/Console_Table-1.1.3.tgz
sudo tar -xf Console_Table-1.1.3.tgz -C /usr/share/pear/drush/lib

## fix the httpd.conf so clean urls work
sudo sed -i '151s/.*/    AllowOverride All/' /etc/httpd/conf/httpd.conf
sudo service httpd restart

## create a test index.php file
touch /var/www/html/index.php
echo "<?php phpinfo(); ?>" >> /var/www/html/index.php

## put a little message saying where to view the phpinfo page
sudo yum -y install cloud-utils
echo "Take a look at the following IP to see your PHP config"
ec2-metadata --public-ipv4