Can't login, although password is correct

Question

Here what's happening when I try to log in.

I'm entering the right password

It brings me back me to the login screen.

I tried to change password via another user but it didn't help.

Answer 1

If you've been starting graphic applications from the terminal using sudo, that's what probably caused your problem. Always use sudo -H.

• boot to the GRUB menu
• choose Advanced Options
• choose Recovery mode
• choose Root access
• at the # prompt, type:
  • sudo mount -o remount,rw / # remount the disk as rw
  • cd /home/your_username # change directory
  • ls -al .*thority* # list some files

You should see something like this...

-rw------- 1 your_username your_username 407910 Nov  2 08:56 .ICEauthority
-rw------- 1 your_username your_username     58 Jun 23  2017 .Xauthority

If it DOES NOT show -rw------- then...

• sudo chmod 600 .*thority* # change file protection

If it DOES SHOW root root then...

• sudo chown your_username:your_username .*thority* # change file ownership

• reboot # reboot the computer

Reboot and see if you can log in.