log into another linux system with using password only once

$cmd:ssh-keygen -t rsa
press enter it will ask for customization
$cmd:scp ~/.ssh/id_rsa.pub username@ipaddress:.ssh/authorized_keys2

it will ask for password enter password
eg:
save passwd for 200 or 205:

$cmd:scp ~/.ssh/id_rsa.pub anjaneyavsk@192.168.36.205:.ssh/authorized_keys2