You might not be using the login shell
. That could be the possible reason why you are unable to select ruby 2.1.1
. Also, you won't have ruby installed in your system (not using RVM), that's why it is telling to install ruby.
Just reopen another terminal and try the below command from terminal and from your project folder to enter in to the log in shell (normally bash
profile):
/bin/bash --login
After that, just run
rvm use ruby-2.1.1
You don't need to run this command every time you take the terminal. But, for that please refer this SO answer.
Hope it helps :)