change from guest to a password login

[rosy-posy]

Hi, I needed to access my computer before I had a chance to learn what my son had replaced all the crap in my laptop with and couldn't think of a worthy password at the time so entered as a guest. Now ready to set a password I seem unable to remove the guest status.
Thank you.

[kukamuumuka]

What tell commands

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ls /home

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whoami