title: Error installing datastax cassandra 2.0
body: <p>I am unable to install datastax cassandra 2.0 on Ubuntu. I can install 2.1 without any problem but I need to run 2.0.9. I am following these steps, is there any thing that I can do to install 2.0?</p>
  
  <pre><code>echo "deb http://debian.datastax.com/community stable main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list
  curl -L http://debian.datastax.com/debian/repo_key | sudo apt-key add -
  sudo apt-get update
  sudo apt-get -y install  dsc20
  </code></pre>
  
  <p>and the error is:</p>
  
  <pre><code>$ sudo apt-get -y install  dsc20
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   dsc20 : Depends: cassandra (= 2.0.10) but 2.1.0-2 is to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>