It is easy to setup ssh keys and you only need to type two commands.
First, create a ssh keys on local freebsd system (do not assign pass phrase key when asked)
Use scp to copy .ssh/id_rsa.pub file (key) to remote linux/freebsd server:
Code:
scp .ssh/id_rsa.pub you@remote.server.com:.ssh/authorized_keys2
Now test it i.e. login from your local FreeBSD to remote server w/o password: