rvm-download is an rbenv plugin that provides an rbenv download command to download and extract ruby binaries from the RVM binaries repository.
git clone https://github.com/garnieretienne/rvm-download.git ~/.rbenv/plugins/rvm-download
Usage: rbenv download <ruby-version>
Example: downloading ruby 2.1.0:
vagrant@precise64:~$ rbenv download 2.1.0
Download and extract ruby 2.1.0 from RVM repository
Ruby 2.1.0 has been installed
Example: trying to download a missing package
vagrant@precise64:~$ rbenv download 1.8.2
Download and extract ruby 1.8.2 from RVM repository
http://rvm.io/binaries/ubuntu/12.04/x86_64/ruby-1.8.2.tar.bz2 cannot be reached
Cannot found a built version of ruby '1.8.2' compiled for your current system: Ubuntu x86_64 (12.04)
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
Install the libyaml package available on your distribution. (libyaml-0-2 on Ubuntu)