{
    @lines = grep { !/^\s*alias\s*eth[01]/ } @lines;
    if (defined $EthernetDriver1 && $EthernetDriver1 ne "unknown")
    {
	push @lines, "alias eth0 ${EthernetDriver1}";
    }
    if (defined $EthernetDriver2 && $EthernetDriver2 ne "unknown")
    {
	push @lines, "alias eth1 ${EthernetDriver2}";
    }
    "";
}
