Linux rsync, scp without password prompting

On source server:

[oracle@oradbpr] $ ls -rlt /home/oracle/.ssh/id_rsa.pub

if above file exists, copy id_rsa.pub to destination server, else generate with below ssh-keygen command.

[oracle@oradbpr] $ ssh-keygen -t rsa

Hit enter key, when prompted for passphrase.
private key and public key generated at /home/oracle/.ssh/id_rsa.pub
copy id_rsa.pub file to remote server.(destination server)

[oracle@oradbpr]$ scp /home/oracle/.ssh/id_rsa.pub oracle@oradbdr:/home/oracle
oracle@oradbdr's password:

On destination server:

[oracle@oradbdr] $ pwd
/home/oracle
[oracle@oradbdr] $ cat id_rsa.pub >> /home/oracle/.ssh/authorized_keys
[oracle@oradbdr] $ chmod 700 /home/oracle/.ssh/authorized_keys

On source server:

[oracle@oradbpr] $ rsync -avH /orabkp/ARC_PROD* oracle@oradbdr:/backup/archbkp

now rsync without password prompting.