I try from the linux too and i can't connect again..
[root@muwlfy ~]# ssh test-user@localhost
The authenticity of host 'localhost (::1)' can't be established.
RSA key fingerprint is b2:b4:10:ba:3a:e9:69:f4:0a:a5:4f:d7:60:3c:f0:1b.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
Last login: Sun May 20 18:36:48 2012 from 22.214.171.124
Connection to localhost closed.
I make everythink like in this tutorial: http://ubuntuforums.org/showthread.php?t=248724