Instructions to install rails 4.0 and ruby 2.0 to create a new web app

rails4_install

# Install openssl to avoid getting an openssl error while creating a new app
# Check out http://goo.gl/HapK4 for more details
$ rvm pkg install openssl
$ rvm pkg install iconv

# Install ruby 2.0 using rvm
$ rvm install ruby-2.0.0-p195 -C --with-openssl-dir=$HOME/.rvm/usr,--with-iconv-dir=$HOME/.rvm/usr

# Set ruby 2.0 as default
$ rvm use ruby-2.0.0-p195 --default

# Install rails
$ gem install rails --version 4.0.0.rc1 --no-ri --no-rdoc

# Create new rails app
$ rails new sample_app

# Open the app directory
$ cd sample_app

# Run db migrate
$ rake db:migrate

# Start the server
$ rails s

# You should see the default rails page when you go to http://localhost:3000