Remove sudo because to run sudo you should already have to have it installed
Add git to download sources from github
<pre><code>~$ <span class="userinput">sudo apt-get install \
bison build-essential gettext libcurl3 libcurl3-gnutls \
libcurl4-openssl-dev libpcre3-dev libpq-dev libreadline-dev \
- libssl-dev libxslt1.1 postgresql sudo wget zlib1g-dev
+ libssl-dev libxslt1.1 postgresql git wget zlib1g-dev
</span></code></pre></notextile>
Also make sure you have "Ruby and bundler":install-manual-prerequisites-ruby.html installed.