How do I install Ruby gems when using RVM?

Question

I set up RVM and used it to install Ruby and a few other libraries. As I was going through various tutorials and set-ups of other technologies like Rails, I began getting confus

Answer 1

No need to install rubygems. RVM should have already installed rubygems. RVM is (in my opinion) useful for managing different installations of ruby (say 1.8.7 and 1.9.2) or different gemsets. If you just have one version of ruby and don't care about different gemsets, RVM isn't really that much of a change. If you want to just install rails, just use gem install rails. If you have an existing rails 3 app, install bundler first gem install bundler and then bundle install to get rails and other gem dependencies.