Thank you Steve for your guidance. I hope our correspondence will very helpful for another "fresh raspberry users". I feel I'm pretty close to the success
But...
Now I can see the the dashboard of Cumulus MX in the browser, I can change and save the settings , but my Raspberry can't find my weather station (WH1080)
Current culture: English (United Kingdom) //for default right format of decimal
Serial: 74FECEABEB2DA94ECB5EBA0CD11A7137
Cumulus MX v.3.0.0 build 3033
Today.ini = data/today.ini
Last update=2015-11-23T12:37:37
Fine Offset station not found
Cumulus running at: http://*:8998/
(Replace * with any IP address on this machine, or localhost)
Starting web socket server on port 8002
23/11/2015 12:37:38
My weather station (WH 1080) is connected with my Raspberry Pi by the ordinary USB wire.