Can't login after hibernation on Linux Ubuntu, what should I do?

Question

linux

In general, I set up LAMP (namely phpmyadmin mysql php WordPress, etc.) (like LAMP is called) on Linux, I decided not to turn off the PC, but send it to sleep so as not to start everything again. After 3 hours I turn it on, I want to enter a password, but it is not entered and says an authentication error. I decided to turn it off by pressing the button. Then it turns on, as usual, the boot screen, but a sharp black screen, Ubuntu 18.04.2 LTS aleksei tty1 is written on top and asks for a username and password, I enter the correct data, but he says no. What to do? On the Internet, they write something like through the console, you need to do manipulations, but where can I get it when loading? They also say that save / home, and demolish the rest and install it again, but I don’t want to deal with this crap again, do markup again, etc., etc. In OS Linux not so long ago, she made me so many problems, but I can’t refuse,
For some reason, the photos are not loading, maybe I'm doing it from my phone, but I don't want to reconnect another HDD with Windows.

Answer 1

Obviously - wrong password / username...
https://www.mytechnote.ru/kak-sbrosit-parol-admini...