I got the problem that I am unable to acces internet through our ethernet cable. The cable is plugged in the main internet source and connected to the RPI.
When I connect this cable on the same way as discribed above and plug it in a pc I have internet acces.
The strange thing is that the RPI can see the ehternet cable and shows his IP addres with ifconfig, but I cant ping it.
Because of this I am not able to download : wget ‘http://files.emlid.com/apm/apm.deb’ -O apm.deb.
Someone knows how to fix this or knows another way to get the file on the rpi and instal it?