…or basically any Linux machine

Applications I’m using for this tutorial

sudo apt-get install git curl vim

instal dependencies:

sudo apt-get -y install build-essential zlib1g-dev libssl-dev libreadline-gplv2-dev

Download and install rbenv

NOTE: If you reinstalling rbenv you may need to explicitly specify RBENV_ROOT before running instaling curl bash

To install rbenv run this in terminal:

cd ~
curl -L https://raw.github.com/fesplugas/rbenv-installer/master/bin/rbenv-installer | bash

Add rbenv to your `.bashrc

vim ~/.bashrc and add

export RBENV_ROOT="${HOME}/.rbenv"
# export RBENV_ROOT="/opt/rbenv/" # some developers prefare this option I highly recommend 
                                  # to instal rbenv to home folder of deploy user as it's 
                                  # convention 

if [ -d "${RBENV_ROOT}" ]; then
  export PATH="${RBENV_ROOT}/bin:${PATH}"
  eval "$(rbenv init -)"

next you need to load bashrc changes

. ~/.bashrc 

If you are on Ubuntu 10.04, 12.04 or 12.10, before you install ruby you need to run:

rbenv bootstrap-ubuntu-10-04
rbenv bootstrap-ubuntu-12-04
rbenv bootstrap-ubuntu-12-10

This will install dependencies for ruby. You can check what the scripts are doing at:


…and you can install those dependencies for not listed Ubuntu versions (e.g.: 13.10)

Install ruby of your choice

rbenv install 2.1.1

…this will take some time so go grab a Snickers

if you get message ruby-build: definition not found: 2.1.1, cd to the rbenv folder and do git pull origin master.

This is either located in ~/.rbenv or /opt/rbenv

Set your newly installed ruby as global (default)

rbenv global 2.1.1

To check what is the current global ruby version

rbenv version
# => 2.1.1

to list all rbenv versions:

rbenv versions

Install bundler

rbenv exec gem install bundler  --no-ri --no-rdoc

and run rehash, so that the change is pickend up

rbenv rehash

if you have any other questions just run

rbenv help

rbenv update Ruby version

let say new ruby version came up (in my case 2.1.2) and I want to upgrade it

First check if you have your desired version in your already existing ruby-build list

rbenv install --list

if not you need to pull most recent rbenv & ruby-build updates with git from rbenv github repo to location where is your rbenv installed (yes correct your rbenv is just collection of git repos)

cd  ~/.rbenv  # rbenv install location (...or /opt/rbenv/)
git pull # will pull rbenv repo

cd plugins/ruby-build/
git pull # will pull recent ruby builds

Now you can install your desired Ruby version

rbenv install --list  # should now include new ruby version
rbenv install 2.1.2

You will have to install bundler and rvm rehash again.

Now you can remove old ruby to save disk space

rbenv uninstall 2.1.1



eval bundle problem

if your deployment with Capistrano or Mina fails on bundle: not found there is an easy solution mentioned here http://stackoverflow.com/questions/15379618/capistrano-deploy-failing-error-for-rails-bundle-not-found

in your .bashrc file place :

eval "$(rbenv init -)"

…under the rbenv $PATH definition