I have created a newbie password mishmash. At installation I thought I set a System PW and a different Admin PW. Now neither is accepted for authentication for although the System does unlock keyring. I have no idea what I may have done.
For example, when I try to install software, neither PW is accepted for authentication. Likewise, neither is accepted to use su in the terminal.
In BIOS I removed Admin and System PWs but that didn’t resolve the problem.
Do I need to do a fresh install or is there a way to fix this self-inflicted mess? Thank you.