For rails application I had installed Ruby 1.8.7 and Rails 2.3.11. And it was working fine. After that I have installed RVM and REE. So while running ruby script/server it\'s u
This works!
This means to set the "system" ruby as default, you reset RVM's defaults as follows.
rvm reset
NOTE: it works only when there is no default ruby set:
rvm alias delete default
https://rvm.io/rubies/default/