I\'m a RoR-Beginner and I started learning it with the RoR-Tutorial. Actually I\'m at this chapter (http://ruby.railstutorial.org/chapters/static-pages#top) and try to install
How did you install rspec? Did you do a "gem install" or did you put it in your Gemfile? If it's only in your Gemfile, try putting "bundle exec" in front of your command, like this:
bundle exec rails g rspec:install
I know I have to use bundle exec when I run the specs, so you may need it for the init script too (I can't remember from when I did it, but I have the exact same ruby/rails versions)