Installs ruby 1.9.3 from source instead of package or RVM.

ruby.sh

#!/bin/sh
#########
## This script simply installs Ruby 1.9+ from source, 
## eliminating the need for RVM or strange packaged versions.
##
## To run this script right from GitHub use the following command.
## **RUN THIS AS ROOT**
##
## ~$ curl https://gist.github.com/hfase01/3444584/raw/ruby.sh | sh
##########

## Options
# Set your Ruby version here, must be >1.9.
RUBY=ruby-1.9.3-p194

## Work
# Set verbose, so you can see what is going on.
set -o verbose

# Install dependant files for Ruby.
sudo apt install -fy build-essential openssl curl git-core zlib1g \
zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev \
ncurses-dev automake libtool bison subversion pkg-config \
### libreadline6 libreadline6-dev

# Install packages so Ruby can use MySql or Postgresql DB, that way bundle install without error. ;)
sudo apt install -fy libmysql-ruby libmysqlclient-dev postgresql libpq-dev

# Clean things up with apt
sudo apt update
sudo apt upgrade -fy
sudo apt autoclean -fy
sudo apt autoremove -fy
sudo apt clean -fy

# The jewels bro, make them bling.
wget http://ftp.ruby-lang.org/pub/ruby/1.9/$RUBY.tar.gz
tar xfvz $RUBY.tar.gz
cd $RUBY
./configure
make
sudo make install

# Check for old busted rubygem versions.
if [ "$(gem --version)" -lt "1.8.23" ]; then
  curl http://ftp.us.debian.org/debian/pool/main/r/rubygems/rubygems_1.8.24-1_all.deb -O rubygems.deb \
&& sudo dpkg -i rubygems.deb
fi

# Get ready to bundle!
sudo gem install bundler --no-ri --no-rdoc
exit 0

This will work for Precise, however I am not finished writing and testing for Debian and RPM based distro's. :b

I still use RVM myself (comes in handy when I want to use JRuby or RBX), but this is pretty nice. Looks like it should also work with older versions of Ubuntu, at least as far back as Lucid (maybe even older than that).

I am setting up some VM's that I only need one Ruby on (and the ability to run as a Root service) so I decided to put this together. If those packages are fine for almost all Ubuntu Distributions I will try to do a condition for RPM based distro's instead. :D