Hi Igor, I did see that among the tutorials out there, and I did try to follow it but I didn't get very far...
root@odroidc2:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 116.5G 0 disk
`-mmcblk0p1 179:1 0 115.3G 0 part /
On your tutorial you have a boot partition. I used dd to write the img to the emmc. Armbian_5.30_Odroidc2_Debian_jessie_default_3.14.79.img
I have also tried a sdcard.