$ssh user@target // **target asks for a password**
#ssh user@target // **connection works, not prompted for a password**

$ ssh-keygen -t dsa
# mkdir -m 700 /root/.ssh/
# cp /home/user/.ssh/id_dsa* /root/.ssh/
# scp /home/user/.ssh/id_dsa.pub target:/home/user/.ssh/host_key

#cd /home/user/.ssh/
#mv host_key authorized_keys