[svlug] Authentication Problem

[Scott Chau]

So wouldn't you know it...  After setting up my ubuntu 8.10 the way I like
it, I decided to mess it up =)  So basically I had a MDF file that I wanted
to mounted so I could copy some files out.  Decided to download fuseiso
because when I did a search, this application was recommended.  Anyways had
some problems with not being able to view the files after mounting because
of some permission restriction.  Decided do some more searching and I
remember using some command involving "sudo usermod -Gfuse `whoami`" and
something about superuser.  Yeah I know I should probably try and understand
some of these command before just running the command.  Long story short, I
wipe my permission or something cause my account was not in the etc/sudoers
list.  I had to manually edit the file and put my username back in but when
I go to some administration setting, I can't unlock them to change the
setting.  i.e. In "Users Settings"  I if I try to unlock it, it will give me
the error "Could not authenticate"

So my dilemma is should I just format and reinstall? I really don't mind
actually but I want to also learn from my mistakes =) Is there some command
that I can use to reset the permission to it's default? Thanks
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