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I have one user account on my laptop, and it has the same password as the su password. I changed the user account to an auto login account, and now the user password is not accepted (i.e. authentication error) for installations, updates... anything. I'm sure I haven't forgotten the password, and pretty sure I haven't dorked up some setting by logging in as root since I normally have to enter the su password to install updates. When I login and am prompted to enter my password to unlock the user keyring, the password works.

I fear that all efforts will be hampered because I can't get to the su level of control. Help?

Attempts thus far:

Tried this fix, which sounds very simliar - don't have 'clown' command available: Setup auto login and now I do not have root authorization for anything

Tried the simple 'passwd username' without luck – 'Authentication token manipulation error'

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2 Answers 2

Link: How do I reset a lost administrative password?

I found this after a little research, the question goes into more detail as to how one boots into recovery mode, how to then set the password, and other possible solutions to resetting a password.
Also, from my short research it would seem that using the "auto login" feature is a terribad idea because stuff like this happens.
Finally, if it helps, the command wasn't "CLOWN" it was "CHOWN" with an "H" not an "L".

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boot the linux in single user mode and then you will get root terminal. set the password again for the user. http://www.cyberciti.biz/faq/grub-boot-into-single-user-mode/ check the above link, might help

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