Intel Galileo Gen -2 Firmware issue

Hi,

I am using Intel Galileo Gen-2 with Linux envourment. I updated firmware through arduino-1.5.3-Intel.1.0.4 after updation i am unable to see COM port on myb device and nothing is working on my board.

I follow this article Intel® Galileo Board Recovery Mode .

Is serial cable required for firmware updation??

Please let me exact steps now how i will update firmware and required hardware cables(Serial cable,USB to USB HOST port etc)?

Thanks

Shreyansh