#!/bin/bash
if [[ "$1" == "David" && "$2" == "Vajda" ]]
then
echo "Das bin ich"
elif [ "$1" == "David Vajda" ]
then
echo "Das bin ich"
elif [[ "$1" == "David" && -z "$2" ]]
then
echo "Das koennte ich sein"
elif [[ "$1" == "Vajda" && -z "$2" ]]
then
echo "Das koennte ich sein"
else
echo "Das bin ich nicht"
fi