title: Error installing devstack
body: <p>I am trying to install DevStack following the tutorial from <a href="http://architects.dzone.com/articles/openstack-savanna-fast-hadoop" rel="nofollow">here</a></p>
  
  <p>It says I have to run <code>./stack.sh</code> as non-root user and I did. But I am getting this error. </p>
  
  <pre><code>++ [[ -n False ]]
  ++ [[ False != \F\a\l\s\e ]]
  ++ date +%s
  /home/mani/devstack/tools/install_prereqs.sh: line 80: /home/mani/devstack/.prereqs: Permission denied
  +++ err_trap
  +++ local r=1
  +++ set +o xtrace
  stack.sh failed
  </code></pre>