Recover Mode, Was: Re: I messed up some config files, now all my users have lost sudo priv :(

[Rashkae]

Mario Vukelic wrote:

> You can simply choose the recover mode from the bootloader menu,
> although this leaves you without GUI
> 
> 

I have a question with regards to that.  When I choose Recovery mode, it 
prompts me to enter my root password for system maintenance.  How does 
that work in a default Ubuntu install with Root Password disabled?