who idle user how to kill
 

Hy !

When i make who on console there comes:

root pts/1 Feb 27 13:45 (xxxxxxx)

this is an old connection an idle.

I made init 1 .... init 3 but the connection is still there !

What can i do ?

do a:
ps -ef
you will see a couple lines saying something like sshd@.....
and another line(dont remember how it goes exactly).
anyways get the PID no from that and do kill -9 (pid no.).
you will probably have to do this is root since the connection is being used by root.
altrenatively you could just restart the ssh deamon.