title: Segmentation fault on every command line in Ubuntu 16.04
body: <p>I have started getting segmentation fault (core dumped) error message on every command I enter on this EC2 instance. It is running Ubuntu 16.04. I was preparing the machine with Microsoft RDP via SSH tunnel and the last few steps I executed are below:</p>
  
  <pre><code>sudo sed -i 's/^PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config 
  
  sudo /etc/init.d/ssh restart 
  
  sudo passwd ubuntu
  
  sudo apt install xrdp xfce4 xfce4-goodies tightvncserver 
  
  echo xfce4-session&gt; /home/ubuntu/.xsession  
  
  sudo cp /home/ubuntu/.xsession /etc/skel 
  
  sudo sed -i '0,/-1/s//ask-1/' /etc/xrdp/xrdp.ini
  </code></pre>
  
  <p>Now, I am completely stuck. Almost every step produces the "segmentation fault(core dumped) " error. I rebooted the instance as well. What I can do? What are my options?
  Thanks in advance.</p>