Enable passwordless rsync/ssh

Scenario:
Server:1 192.168.1.211
Server:1 192.168.1.222

Objective:
Enable passwordless rsync from server1 to server2

Steps:
1. Enable root login
2. set root password
3. check current ssh status
ssh -p 22 root@192.168.1.222

4. create your SSH key pair
ssh-keygen -t rsa -b 4096

5. locate keys
ls -ll /root/.ssh
-rw------- 1 root root 3243 Jul 31 13:58 id_rsa
-rw-r--r-- 1 root root 737 Jul 31 13:58 id_rsa.pub

6. ssh-copy-id root@192.168.1.222
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.1.222's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'root@192.168.1.222'"
and check to make sure that only the key(s) you wanted were added.

7. Job is done. Now check again with ssh. This time it will not prompt for the password.

8. Set the cronjob as per requirement:
*/2 * * * * rsync -avz -e ssh /test/* root@192.168.1.222:/tmp/