ssh without password

Mashine A - Host
Mashine B - Client

On host B do this:

ssh-keygen -t rsa -b 2048 -C "Enibody Name"

After generate key.pub, copy into pashine B with command

ssh-copy-id -i id_rsa.pub user@mashineB
or
scp ~/path to id_rsa.pub username@ip:/home/usenname/.ssh/id_rsa.home.pub

on machine B do this:
cat id_rsa.home.pub >> authorized_keys

Hint2
On the mashine A in .ssh creata file caonfig with text:

Host virtual
    HostName 192.168.1.4
    Port 22
    User username