Activate Root Login In Ubuntu ( In KDE Plasma Desktop )

 By Default the root login is not permit in KDE Plasma Desktop. To activate its root login you have to change setting of kde. the file located in directory
/etc/kde4/kdm/kdmrcI’m using kde4 .Check yours.
Step To Activate Root  Login In KDE Plasma Desktop:

  1. Open Terminal
  2. Enter The Following Command

    sudo gedit /etc/kde4/kdm/kdmrc 
  3. Now kdmrc is open.Find(ctrl+f) the string AllowRootLogin .

    By default its value is false Change it to true

  4. Now Root Login Allowed.
  5. Restart and enjoy permotion.