[clug] Blank CD-R Disc

Bryan Kilgallin kilgallin at iinet.net.au
Sun Sep 2 09:00:31 UTC 2018

Dear Scott:

>> As I have been trying to explain, my username cannot use sudo!
>> {gpasswd: Permission denied.}
> Odd, by default, on Ubuntu, members of the sudo group have sudo
> privileges.

That was the case. But I have accidentally deleted my username from the 
sudo group!

> And by default, all users are members of the sudo group.

As above, now my username appears to have been deleted from it!

> To diagnose the problem preparatory to fixing it, please post the output
> of the following command (run as brian, or whatever your username is):-
> su -c "grep '^[^#]' /etc/sudoers"

{su: Authentication failure}

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