From Unix/Linux system, you do not need to enter your login password for every login to your remote login.
You may create a RSA key to allow you to log into your remote server/box.
To create the RSA key, type the following command.
ssh-keygen -t rsa
Enter each of the question being asked.
Then log into the server that you would like to authenticate login and paste the code from /root/.ssh/id_rsa.pub to /root/.ssh/authorized_keys of the remote server.