rbenv is an alternative to rvm for managing your Rubies. You can find some articles comparing the two. In general, rbenv is more lightweight without overriding the cd and gem command which rvm does and their similarities outweigh their differences. Here is a great article written by Jonathan Jackson about the two solutions.
For Mac users, you could install rbenv using Homebrew. Otherwise, you need to checkout the repository on GitHub.
The pyenv is a fork from rbenv for managing Python versions on your machine.
Here is the steps to install pyenv thru homebrew. Alternatively you could install thru the pyenv-installer and replace step 1 – 4 below.
1. Update your homebrew.
brew update
2. Install pyenv thru homebrew.
brew install pyenv
I would like to try the rbenv to manage my ruby version.
So i need to uninstall the rvm on macbook air. This could be done by simply executing:
rvm implode
Eureka! 