I saw on the tutorial you posted, the following Warning:
WARNING: Once the command prompt window closes, you will need to wait at least 2 minutes for the installation to complete. The Edison should reset a couple of times to finalize its installation. Do not unplug the Edison! It’s probably a good idea to walk away for those 2 minutes.
Have you tried with a different USB port (Not sure if you are using the same PC) or different cables?
I suggest you to re-do the Flashing Process and to try with the Yocto image
If you want to continue with Ubilinux, I suggest you to contact EmutexLabs for more appropriate assistance regarding this image.
Thanks for the reply. The issue was with the USB cable that i used, with another USB cable it worked without any probs.