A.3 Adding the Public Key to the Root User’s Set of Authorized Keys

The final step is to add the public key (~/.ssh/id_rsa.pub on the staging host) to the set of authorized keys for the root user on the Conferencing host.

Enter the following commands to add the key:

$ scp ~/.ssh/id_rsa.pub root@zonhost:/tmp

$ ssh root@zonhost

The authenticity of host 'zonhost (W.X.Y.Z)' can't be established.
RSA key fingerprint is df:c7:21:77:ec:53:89:77:4f:32:4d:a8:7a:a2:c2:7c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'jabber,10.0.1.3' (RSA) to the list of known hosts.
root@zonhost's password: ******

# cat /tmp/id_rsa.pub >> .ssh/authorized_keys

# chmod 700 .ssh

# chmod 600 .ssh/authorized_keys

Repeat the above process for all the Conferencing hosts.