In Host Server

generation of ssh key

root@client:~# ssh-keygen

confirmation of ssh key

root@client:~# ls ?al ~/.ssh

firewall set-up

root@client:~# chmod 700 ~/.ssh

root@client:~# chmod 600 ~/.ssh/id_rsa

root@client:~# chmod 644 ~/.ssh/id_rsa.pub

root@client:~# chmod 644 ~/.ssh/authorized_keys

root@client:~# chmod 644 ~/.sshknown_hosts

copy ssh public key to Slave Server

root@client:~# scp~/.ssh/id_rsa.pub root@slave:id_rsa.pub