# update rvm rvm get stable # see already installed versions of ruby rvm list # see what versions of ruby are available for download rvm list known # pick one and install, e.g. rvm install 2.1[.1] # use and set as default rvm use 2.1[.1] --default # install/update rails (the -V shows the process, otherwise it looks as if stuck) gem install rails -V
Q: What’s the difference between version 2.1.[.1] and 2.1-head?
A: The head version would be more up-to-date thus might end up being more unstable.