Problema ssh tra due macchine linux

[arkkimede <arkkimede@gmail.com>]

Salve a tutti.

Volevo collegare con ssh due macchine linux ed ottengo:

$>ssh nomeUSER@nomeHOST
The authenticity of the host 'nomeHost (xxx.yyy.zzz.kkk)' can't be
established.
RSA key fingerprint is 12:52:4e:etc......
Are you sure want to continue conneting (yes/no)? yes
Warning: Permanently added 'xxx.yyy.zzz.kkk' (RSA) to the list of know
hostes.
nomeUser@nomeHost's password:
*********
Permission denied, please try again.
nomeUser@nomeHost's password:
*********
Permission denied, please try again.
nomeUser@nomeHost's password:
*********
Permission denied, please try again.
nomeUser@nomeHost's password:
*********
etc..

Qualsiasi aiuto, suggerimento, indicazione etc sara' gradito