title: How to solve "Kernel panic - not syncing - Attempted to kill init" -- without erasing any user data
body: <p>I was trying to update libc in our Ubuntu server but it failed and now when I reboot the server I get a error message:</p>
  
  <blockquote>
    <p>Kernel panic - not syncing - Attempted to kill init!</p>
  </blockquote>
  
  <p>and it just hangs. </p>
  
  <p>What is the solution to this problem? The server is used by 10 people so I don't want to reinstall erasing their data.</p>