Did you change
I recently change the permission of
/etc/passwd, hoping nobody will be able to glance it for finding the users in the machine, so I change permission to only
root. after some time I turn off my Machine and what I'm seeing
Started User Manager for UID 121.
I restarted my machine two time, when nothing happened, I put out my phone and start searching for solution.
I started thing what happened, suddenly an idea came to my mind, It may be the cause of
I selected the recovery Mode in the Grub, set the file permission to
sudo chmod 644 /etc/passwd
And sounds like Wow, because of unable to be read during login.
You should try the above valuable solution if you didn't play around with