[Solved] network setting?

Hey,

I have messed up my network setting so i can’t reached my Pi by a webbrowser or SSH.

Is it possible to change my network-settings without the web interface, where are they stored?
Options:
editing the SD-card?
with a USB/TTL cable?

THX

Harry

/etc/netwok/interfaces

connect your pi to a display (tv or monitor), login and edit the file.