I ran into this for the first time just recently when installing ruby and was very surprised and hesitant to follow the instructions ( see here <a href="https:&#x2F;&#x2F;www.digitalocean.com&#x2F;community&#x2F;tutorials&#x2F;how-to-install-ruby-on-rails-on-ubuntu-14-04-using-rvm" rel="nofollow">https:&#x2F;&#x2F;www.digitalocean.com&#x2F;community&#x2F;tutorials&#x2F;how-to-inst...</a> ). Glad to see people speaking out against it.