I've messed something up now

Knute Johnson ubuntu at knutejohnson.com
Sat Sep 24 23:47:36 UTC 2011

On 9/24/2011 6:34 AM, Rashkae wrote:
> On 09/23/2011 11:54 PM, Knute Johnson wrote:
>> I'm getting a message when I try to sudo that I'm not in the sudoers
>> file. Any idea what I've done and how to fix it?
>> Thanks,
> Without more information, I suspect that when you added yourself to the
> "camera" group (in your previous thread)
> you did something like usermod -G camera, which would have effectively
> destroyed your group membership and replaced it with Camera. (You have
> to use the -a switch with usermod when adding a user to a group. A very
> unfortunately poorly thought out command.)
> As to how to fix, you need to reboot to a root shell. When booting your
> system, activate the grub menu (I believe that is now done by holding
> the shift key when grub first starts up.) From the menu, choose the
> rescue or failsafe boot option. You should then, at some point, be given
> the choice to boot into a root shell. From there, you can use
> /usr/sbin/usermod -a -G admin username to give yourself sudo permissions
> again.


Thanks very much, you diagnosed that one perfectly.  I would have had no 
clue how to do that.

Thanks again,


Knute Johnson

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