$ rvm use ruby@veewee --create
RVM is not a function, selecting rubies with 'rvm use ...' will not work.
You need to change your terminal emulator preferences to allow login shell.
Sometimes it is required to use `/bin/bash --login` as the command.
Please visit https://rvm.io/integration/gnome-terminal/ for an example.
Please add the following before the "rvm use" command.
You may have to also run
/bin/bash --login
Source: http://stackoverflow.com/questions/9336596/rvm-installation-not-working-rvm-is-not-a-function
Otherwise you'll get the following error message: