Enocean pi

I installed openhab via apt-get.

Now I want to add a enocean pi and I must add -Dgnu.io.rxtx.SerialPorts = / dev / ttyAMA0
to the start.sh .

But I have no start.sh .

Where can I find it?

In apt-get installs it is actuall /usr/share/openhab/bin/openhab.sh I think.