Can not install json gem with ruby 2.2.3 on Ubuntu

Question

I am going through a Rails tutorial and I\'m not able to complete \'bundle install\' due to a problem with the json gem. When I attempt to install it directly:

Answer 1

Try running rvm implode and then following this guide http://ryanbigg.com/2014/10/ubuntu-ruby-ruby-install-chruby-and-you/

I suspect RVM did not include the correct headers for you.