How do I install ruby 2.0.0 correctly on Ubuntu 12.04?

Question

I have successfully installed rvm, but when I run the following commands

sudo apt-get update

Or:

rvm install 2         


        

Answer 1

From the travis-cli installation instructions for Ubuntu, the Brightbox Ruby NG(NextGeneration) ppa:

$ sudo apt-get install python-software-properties
$ sudo apt-add-repository ppa:brightbox/ruby-ng
$ sudo apt-get update
$ sudo apt-get install ruby2.1 ruby-switch
$ sudo ruby-switch --set ruby2.1

Answer 2

Use rbenv

The first step is to install some dependencies for Ruby.

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties

Installing with rbenv is a simple two step process. First you install rbenv, and then ruby-build:

cd
git clone git://github.com/sstephenson/rbenv.git .rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL

git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
exec $SHELL

rbenv install 2.0.0
rbenv global 2.0.0
ruby -v

The original post on gorails.com

Answer 3

Use rvm to install stable ruby:

curl -sSL https://get.rvm.io | bash -s stable --ruby

or, if you have rvm already, get stable version:

rvm get stable

Install ruby and use the specific version of ruby (remember to use login shell)

/bin/bash --login
rvm install 2.0.0
rvm use 2.0.0
rvm rubygems latest
ruby --version

As found on the official RVM website.

EDIT: As @prem points out run this at first and follow the above steps if there is a public key error

gpg --keyserver hkp://keys.gnupg.net --recv-keys \ 409B6B1796C275462A1703113804BB82D39DC0E3

Use rbenv to install ruby:

Install necessary dependancies:

sudo apt-get update && sudo apt-get install git-core curl zlib1g-dev \
build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev \
sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev \
python-software-properties libffi-dev

Install rbenv:

cd
git clone git://github.com/sstephenson/rbenv.git .rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile

git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bash_profile
source ~/.bash_profile

Install ruby:

rbenv install -v 2.0.0

Answer 4

Any easy way to install ruby is with ruby-install. I had compile errors when building ruby from scratch, but ruby-install encountered no such problems.

edit: I've had problems with rvm in the past, and feel I should actively recommend against this. That's just me personally, though. I've had okay luck with rbenv, but always use it in conjunction with ruby-install.

Answer 5

You have some ppa sources enabled that aren't available for your version of Ubuntu. Comment those out in your /etc/apt/sources.list , run sudo apt-get update , and you'll be fine.

Answer 6

I put @PravinMishra's source into a Gist and now you can simply use this one liner:

wget -O - https://git.io/vvkI4 | bash

NOTE: Don't trust my Gist blindly, download the file and look into it before you run it!