RVM is not a function, selecting rubies with 'rvm use ...' will not work

Question

Your console is not running as a login shell and hence have no access to rvm function. If you are running Ubuntu, you can:

1. Open console
2. Select Edit -> Profile Preferences
3. Select tab: Title and Command
4. Check box 'Run command as a login shell'
5. Restart terminal

Type bash --login from your terminal. And then give rvm use 2.0.0

It seems like your rvm does not load ".bash_profile" properly. I have done to fix it in MAC OS X or Ubuntu 14.04 by opening terminal and write:

source ~/.rvm/scripts/rvm

My env is OSX Yosemite. Had the same issue .... solved by adding the following

1) edit and add the following line to .bash_profile file.

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"

2) Restart terminal and try RVM command again