done
echo
-ssh-keygen -R "[localhost]:$SSH_PORT" -f ~/.ssh/known_hosts
-docker exec ${NAME} bash -c "mkdir -p /home/$DOCKER_USER/.ssh"
-docker cp ~/.ssh/id_rsa.pub ${NAME}:/home/$DOCKER_USER/.ssh/authorized_keys
-docker exec ${NAME} bash -c "chown $DOCKER_USER:$DOCKER_USER -R /home/$DOCKER_USER/.ssh ;chmod 0700 /home/$DOCKER_USER/.ssh; chmod 0600 /home/$DOCKER_USER/.ssh/*"
-ssh -o StrictHostKeyChecking=no -p $SSH_PORT $DOCKER_USER@localhost exit
+[ -f ~/.ssh/known_hosts ] && { ssh-keygen -R "[localhost]:$SSH_PORT" -f ~/.ssh/known_hosts || exit 1; }
+[ ! -f ~/.ssh/id_rsa.pub ] && { ssh-keygen -t rsa -f ~/.ssh/id_rsa -P "" > /dev/null || exit 1; }
+docker exec ${NAME} bash -c "mkdir -p /home/$DOCKER_USER/.ssh" || exit 1
+docker cp ~/.ssh/id_rsa.pub ${NAME}:/home/$DOCKER_USER/.ssh/authorized_keys || exit 1
+docker exec ${NAME} bash -c "chown $DOCKER_USER:$DOCKER_USER -R /home/$DOCKER_USER/.ssh ;chmod 0700 /home/$DOCKER_USER/.ssh; chmod 0600 /home/$DOCKER_USER/.ssh/*" || exit 1
+ssh -o StrictHostKeyChecking=no -p $SSH_PORT $DOCKER_USER@localhost exit || exit 1
echo "You can now login using:"
echo " ssh -p $SSH_PORT $DOCKER_USER@localhost"