Now i got to see the hidden files with ls -a

but I can't seem to get into root to find the files that need changing.

Feel very nervous about this, don't want to nuke the OS !

Code:
tim@tim-A880G:~$ ssh -l pi 192.168.1.105 
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 
@    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 a host key has just been changed. 
The fingerprint for the ECDSA key sent by the remote host is 
b5:a2:ef:bf:83:61:ae:c0:b2:f4:59:0e:b3:12:8f:ff. 
Please contact your system administrator. 
Add correct host key in /home/tim/.ssh/known_hosts to get rid of this message. 
Offending ECDSA key in /home/tim/.ssh/known_hosts:6 
  remove with: ssh-keygen -f "/home/tim/.ssh/known_hosts" -R 192.168.1.105 
ECDSA host key for 192.168.1.105 has changed and you have requested strict checking. 
Host key verification failed.
Any thoughts anyone ?

A puzzled,

Tim