ssh login no password

• modify the /etc/ssh/sshd_conf

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys

• ssh-keygen -t rsa

• cd $home/.ssh

• cp  /.ssh/identity.pub  /.ssh/authorized_keys

• restart sshd

• ssh-agent $SHELL
  ssh-add