Login to a remote server from another server with SSH Pubkey Authentication, and avoid the password prompt.
SSH Pubkey Authentication
Create an SSH key for pubkey authentication
#ssh-keygen -t rsa
#ssh-keygen -t dsa
Copy the key to the remote server
#scp ~/.ssh/id_dsa.pub email@example.com:
On the remote server
#cat id_dsa.pub >> ~/.ssh/authorized_keys
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