You will need to login to the web gui and create a new key for the My Book. Look in the advanced settings. Once that is done try reconnecting via ssh again.
If you attempt to login to an SSH server, and receive a message simliar to the following, that means your server host key has changed:
"WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
Add correct host key in /home/jdoe/.ssh/known_hosts to get rid of this message.
Offending RSA key in /home/jdoe/.ssh/known_hosts:19
RSA host key for *** has changed and you have requested strict checking.
Host key verification failed.
On most Linux and Mac clients, you will need to manually remove the host key in order to reconnect. Take note of the following line in the warning output:
Offending RSA key in /home/jdoe/.ssh/known_hosts:19
example:
Offending key in /home/mike/.ssh/known_hosts: 6
You have to remove the key to proceed further. Use the following command to remove the offending key.,
##Note: Change the line number from 6 to appropriate line number.
sed -i '6d' ~/.ssh/known_hosts
or
perl -pi -e 's/\Q$_// if ($. == 6);' ~/.ssh/known_hosts
Open the file manually in your favorite text editor (it is a hidden file), and remove the offending line. In this example, the user would open the /home/jdoe/.ssh/known_hosts file and remove line 19.
Save the file and attempt to reconnect. You will need to manually approve the new host key the first time you connect:
ssh ude.usf.cph.timbus|eodj#ude.usf.cph.timbus|eodj
The authenticity of host 'submit.hpc.fsu.edu (144.174.80.99)' can't be established.
RSA key fingerprint is a4:d9:a4:d9:a4:d9a4:d9:a4:d9a4:d9a4:d9a4:d9a4:d9a4:d9.
Are you sure you want to continue connecting (yes/no)? yes
You should be now connected via ssh.
Remember you can use Google if you need more help.