title: Install Ruby and bundler
...
-We recommend Ruby >= 2.1. We currently require Bundler 1.9 (not 1.10 or above) because of a limitation in some of our gem dependencies.
+Currently, only Ruby 2.1 is supported.
h2(#rvm). Option 1: Install with rvm
<notextile>
<pre><code>~$ <span class="userinput">gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3</span>
~$ <span class="userinput">\curl -sSL https://get.rvm.io | bash -s stable --ruby=2.1</span>
-~$ <span class="userinput">gem install -v 1.9.9 bundler
+~$ <span class="userinput">gem install bundler
</span></code></pre></notextile>
h2(#fromsource). Option 2: Install from source
+Install prerequisites for Debian 7 or 8:
+
+<notextile>
+<pre><code><span class="userinput">sudo apt-get install \
+ bison build-essential gettext libcurl3 libcurl3-gnutls \
+ libcurl4-openssl-dev libpcre3-dev libreadline-dev \
+ libssl-dev libxslt1.1 zlib1g-dev
+</span></code></pre></notextile>
+
+Install prerequisites for CentOS 6:
+
+<notextile>
+<pre><code><span class="userinput">sudo yum install \
+ libyaml-devel glibc-headers autoconf gcc-c++ glibc-devel \
+ patch readline-devel zlib-devel libffi-devel openssl-devel \
+ automake libtool bison sqlite-devel
+</span></code></pre></notextile>
+
+Install prerequisites for Ubuntu 12.04:
+
+<notextile>
+<pre><code><span class="userinput">sudo apt-get install \
+ gawk g++ gcc make libc6-dev libreadline6-dev zlib1g-dev libssl-dev \
+ libyaml-dev libsqlite3-dev sqlite3 autoconf libgdbm-dev \
+ libncurses5-dev automake libtool bison pkg-config libffi-dev
+</span></code></pre></notextile>
+
+Build and install Ruby:
+
<notextile>
<pre><code><span class="userinput">mkdir -p ~/src
cd ~/src
-wget http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.5.tar.gz
-tar xzf ruby-2.1.5.tar.gz
-cd ruby-2.1.5
-./configure
+curl http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.6.tar.gz | tar xz
+cd ruby-2.1.6
+./configure --no-install-rdoc
make
sudo make install
-sudo gem install -v 1.9.9 bundler</span>
+sudo gem install bundler</span>
</code></pre></notextile>