Today I have updated from my Ubuntu 18.04 to 18.10 by software upgrade app ( coudn't wait till tomorrow ?). It took a bit of time, but at the end of it I was asked to restart my PC. Upon restarting, I get to boot runtime.
The boot log on screen passed numerous processes like gnome manager and stopped on "Started bpfilter". I waited 15 min., but nothing changed. Tried to restart the PC manually two times, but the result was still the same.
The interesting bit for me, after the message, it seems like an instance of terminal is given to me, – I can freely write letters. Though commands like cd, ls are not working.
My GPU is NVidia GTX 1060, CPU Intel i5-7500. I dual boot along with Windows 10.
What would be your recommendations to fix this or debug what could be wrong?