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OK, I read the other thread, got so far as to connect to the printer, but no command I give actually moves it., they just build up commands. Using repitier host. Latest Ubuntu(not quite sure of the version # honestly)

How do you know that you connected? Does the temperature readout in the status bar at the bottom of the window show the temperature - probably room temperature since you are not heating?

Try pushing the reset button on RAMBo (it's next to the USB connector).

What firmware are you using? If Repetier, you can also try to open the EEPROM window if you have that enabled - which is the default case. RH can only open the EEPROM if it is actually connected.

I had the same problem at first. It took me a while to sort out. Repetier Host runs on Mono, which does not support custom baud rates in Linux. The baud rate in the firmware has to be changed to 115200, and your settings in Repetier host should reflect that (under config->printer settings->connection). http://www.soliwiki.com/Linux#RepetierHost The port you're connected to should be something like /dev/ttyACM0. You'll need the arduino sdk to update the firmware. http://www.arduino.cc/