install rvm and ruby 1.9.2 on Ubuntu 12.04

install-ruby.sh

#!/usr/bin/env sh

# according to http://octopress.org/docs/setup/rvm/

# !! notice the line about bash and zsh!!!

sudo apt-get install build-essential openssl libreadline6 libreadline6-dev 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

bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)

# If using bash
echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function' >> ~/.bash_profile
source ~/.bash_profile

# If using Zsh do this instead
echo '[[ -s $HOME/.rvm/scripts/rvm ]] && source $HOME/.rvm/scripts/rvm' >> ~/.zshrc
source ~/.zshrc

rvm install 1.9.2 && rvm use 1.9.2
rvm rubygems latest