Linux compatibility.

I see a few unanswered questions in the forums relating to this.

1. No tty is created upon connection via usb. A normal arduino created ttyASM0 usually.

Recommendation is to flash firmware.

2. No mention of a linux flash utility. Only win/mac. Is this correct or did I dfrobot something?

EDIT:

Also unable to use FDTI. I've tried a few different ones all known working and I get nada. Tried entering AT mode, no reply. FTDI setup is tx/rx pads with leads soldered on to usb adapter.

Thanks
Bruce