Unable to open the login interface/Unable to log in, what should I do?
The reason may be that some operations have damaged the system.
1 Please try to enter the desktop as follows:
(1) Press ctrl + alt + F2 to enter the terminal. If it does not work, change F2 to F1~F7, as long as you can enter the terminal
(2) Enter startx in the terminal and press Enter.
2 If it does not work, enter the following command in the terminal to reinstall the Raspberry Pi UI (graphical interface):
sudo apt-get install --reinstall raspberrypi-ui-mods
3 If it still does not work, you need to reburn the system in the SD card