title: Uninstall cassandra from ubuntu
body: <p>I want to uninstall cassandra from my PC(ubuntu 14.04). I run this command.</p>
  
  <p>sudo apt-get remove cassandra</p>
  
  <p>I got this error :-> <strong>username is not in the sudoers file.  This incident will be reported.</strong></p>
  
  <p>Please help me to remove cassandra.</p>