How to login to another computer ?
I have tried this in Cent OS and worked fine.
# Login to another computer
-> ssh root@ipaddress [ example: ssh firstname.lastname@example.org ]
# Login to another computer without password
# Step One:
-> Press Enter few times.
-> Check for the file id_rsa and id_rsa.pub if created in /root/.ssh
# Step Four: Copy and paste two files into the destination computer
-> ssh-copy-id email@example.com
It will ask for a password one time.