HOW SIMPLEUSER CAN SHARE HIS SCREEN WITH ROOT USER
--------------------------------------------------

http://www.tonido.com/blog/index.php/2008/09/11/sharing-your-ssh-commandline/

1) user juhan creates session:

juhan:~$ screen -L -S juhanssession

2) root grabs tty and logins as juhan

root:~# chmod 777 `tty` ; su - juhan

3) root -> juhan joins juhan's session

juhan:~$ screen -x juhanssession