Here is the way to avoid re entering the password each and every time by generating a key pair Id and moving to remote machine only once.
ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/localuser/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/localuser/.ssh/id_dsa.
Your public key has been saved in /home/localuser/.ssh/id_dsa.pub.
The key fingerprint is:
93:58:20:56:72:d7:bd:14:86:9f:42:aa:82:3d:f8:e5 localuser@mybox.home.com
scp ~/.ssh/id_dsa.pub username@remotemachine:.ssh/authorized_keys
login to remote machine
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys
