title: Can't login ubuntu after typing "chmod -R 744 /home"
body: <p>Just a few days ago, I logged in my ubuntu PC as root, typed "chmod -R 744 /home", and rebooted my PC. Since then, I found that I couldn't log in my account due to permission issues. The only account I can log in is "guest". Can anyone help me so that I can log in ubuntu with my original account?</p>
  
  <p>The version of my ubuntu is 12.04 LTS.</p>
  
  <p>This is a huge problem to me, any help would be highly appreciated.</p>