How do I change my Ruby version using RVM?

Question

I am not able to switch the current Ruby version:

➜  ~  rvm list

rvm rubies

   ruby-1.9.2-p290 [ x86_64 ]
   ruby-1.9.3-p0 [ x86_64 ]

➜  ~  rvm use ruby-1.9.3-p0

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

Answer 1

Fixed it. I needed to add:

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"  # This loads RVM 

to .zshrc

Answer 2

This happened to me too. I had:

export PATH=~/.rvm/bin:$PATH

Added in my .bashrc.

All I had to do was add another

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

to the same file and it worked! Of course, you have to restart your terminal after that.

Answer 3

Your shell doesn't know about the RVM function. After you install it, it tells you how to take care of this. Or go to the install page on the RVM site and check out the section titled "2. Load RVM into your shell sessions as a function"

Run this once to add the line that loads rvm into your ~/.bash_profile:

$ echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bash_profile

or manually add it yourself. (Note that on some systems, you will want to put it in other places, for example on my system, Mac OSX Lion, I put it in ~/.profile)