Can't reset password, will it help?

Question

linux

Debian 10
Couldn't do any commands in the terminal got the message "is your user locked?" I thought the error closed it, I open it, it doesn’t open, I reboot the black screen, it asks for Artem login login: I enter my login artem , login incorect I
went from under the root through the hornbeam and adding rw single init=/bin/bash
I get [email protected](none)
I try to reset the password writes :
Authentication token nanipulation error
Password unchanged.
Maybe the password can be removed by hand through /etc/shadow ? ,
I don’t even know where to dig to solve this, I’m sitting here for the second day ..
On the hostname command, the output is none, I
entered echo Artem > /proc/sys/kernel/hostname
And Artem displays on the hostname command, but after reboot again none,
In general, I don’t know what is the reason and what to do to solve this problem, what should I do

, thanks to everyone, the question and past questions on this topic are no longer relevant