SP4 APERTA - nota

[Sigismondo Boschi]

Facendo login su sp4 e' facile/normale che otteniate un messaggio di
errore come questo:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
31:5d:2e:74:9b:0f:19:20:11:cb:a6:5f:c3:9a:03:81.
Please contact your system administrator.
Add correct host key in /home/abc0/.ssh/known_hosts to get rid of this
message.
Offending key in /home/abc0/.ssh/known_hosts:24
RSA host key for sp.sp4.cineca.it has changed and you have requested
strict checking.
Host key verification failed.


Questo e' dovuto al fatto che con la re-installazione le chiavi di
identificazione di sp4 sono cambiate. Queste sono memorizzate sulla
vostra macchina da cui fate ssh: dovete cancellare la chiave,
nell'esempio di cui sopra, la linea 24 del file /home/abc0/.ssh/known_hosts

In tal modo al successivo collegamento l'host sara' "sconosciuto" e la
sua nuova chiave di identificazione registrata in quel file.

-----------------------
--- ENGLISH VERSION ---
-----------------------

At last you can access newly to SP4.

Your executable should work yet, but it is better you recompile in order
to benefit of the new compilers (xlf 9.1, vac 7.0) and of the new
optimized collective communications. In particular, for the new
optimazed collective communications, you must compile with 64 bit
addressing (-q64 flag).

Logging in to sp4 it is easy you will get an error like this:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
31:5d:2e:74:9b:0f:19:20:11:cb:a6:5f:c3:9a:03:81.
Please contact your system administrator.
Add correct host key in /home/abc0/.ssh/known_hosts to get rid of this
message.
Offending key in /home/abc0/.ssh/known_hosts:24
RSA host key for sp.sp4.cineca.it has changed and you have requested
strict checking.
Host key verification failed.

This is because with the reinstallation the identifications key of SP4
has been changed. This key is stored on your machine, from where you
type "ssh". You must delete it, in the example avove the line 24 of the
file /home/abc0/.ssh/known_hosts.

In whis way, at the next connection the host will be "unknown" and its
new key will be registered in that file.



--
Sigismondo Boschi, Ph.D.               tel: +39 051 6171559
CINECA (High Performance Systems)      fax: +39 051 6137273 - 6132198
via Magnanelli, 6/3                    http://instm.cineca.it
40033 Casalecchio di Reno (BO)-ITALY   http://www.cineca.it