I cannot restart my laptop. Before rebooting my harddisk was full I don't know if this caused the problem. Now I can see a blankscreen and an underscore where I cannot type anything(automatically erased), when I entered alt+F2 "user login:" option came I entered my username next it showed "PASSWORD:" i cannot type here.. what should I do to start my laptop and fyi my laptop only have ubuntu(no windows)
I tried reboot by pressing power off button for a long time. I saw so many suggestions but I couldn't do anything because I cannot type in the blank screen