I have been trying to run a python GUI program on the beaglebone black through SSH. It is connected to the BBVIEW and the GUI runs if I diirectly open the command window in beaglebone using a keyboard and mouse connected to the beaglebone. I have tried to add “python GUI.py” in uEnv.txt for startup but it still doesn’t seem to startup on reboot. When i try to run it on ssh with BBVIEW connected but not connected to the keyboard or mouse it gives an xDISPLAY error. I am new to this forum so any feedback on the the post is welcome 
you seem new to linux as well
you cannot start your python program in the uEnv.txt file as when your
trying to run it there the X system is not running.
When your trying to run it via SSH are you sure that the X system is up
and running ?
read this. some ways to check if X is running before you start your program
http://stackoverflow.com/questions/637005/x-server-running
ssh -X hostname Mike