I loaded up a little Intel NUC with Ubuntu 14.04 via a USB drive. I must have messed up the password to the default user because it's not working when the system goes to screen saver mode. I was going to just blast it with a new image. But now it seems to be insisting on booting to the internal hard drive (mSATA) and bypassing the bootable USB. Need help with either recovering the password or getting the thing to boot from the USB instead of the hard drive. Thank you.