for 1st check how could i " tested to see if rsh can be used at OS level to run commands on this client without a password "
for 2nd note is it a must to use ssh not rsh(GUI) with linux client ?
also i do the following:
root@m4:/> ssh LS0-EN
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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
f3:ff:53:21:b0:6c:f6:42:d7:71:b0:c3:fe:a9:f1:65.
Please contact your system administrator.
Add correct host key in /.ssh/known_hosts to get rid of this message.
Offending key in /.ssh/known_hosts:636
RSA host key for ls0-en has changed and you have requested strict checking.
Host key verification failed.