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If you are usiung a usb-to-serial-adapter your serial-interface might be /dev/ttyUSB0.

Check the permissions of this device with user@computer:~$ ls -l /dev/ttyUSB0 crw-rw---- 1 root dialout 188, 0 Aug 11 14:16 /dev/ttyUSB0 In order to access this device the user running openHAB needs to be in the group "dailout".

sudo adduser <user> dialout

Reboot your system.

Running openHAB on a Cubieboard(2) is possible. But there are some kinks to figure out. First you have to choose a distribution to install. At first I settled for Cubian, since I was already familiar with Raspbian. But Cubian comes only with very few kernel modules for USB to serial bridges. Since many bindings communicate that way, this was a dealbreaker. Currently I run lubuntu-server-13.06-v1.00, which has all needed kernel modules. Simply install this distribution to the NAND memory (see http://cubiebook.org/ for details). Another problem could be the JDK8. While it was running fine on the Raspberry Pi I had several unexplained crashes of openHAB with the early preview of JDK8. Luckily Oracle released the JDK7 for hard floar arm processors a while ago. Just grab it from here http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html unpack it and use it to run openHAB just like on any other platform.