Le 11.11.2007 14:31, Greg M. Johnson nous fit lire :
> On two different linux boxes (kubuntu  fawn and Knoppix 5.01),  I have lost
> my ability to do "su".  It is rejecting the password.  Now I'm sure I have
> not forgotten the root password, as it was very memorable, and I can still
> log in with the "regular user" password, and it rejects this main user
> password.   I'm at a loss to explain or fix.
> 
> 1) Linux, if you don't use su for a year, locks it up until you use command
> _____________.
> 2) I really did forget my root password.  (Yikes, must I re-install??)
> 
> 3) I caught a virus.
> 
> 
> None of these options make sense.

kubuntu, I do not know, but Fawn on ubuntu I do.
Modern (recent) distribution (or update) more and more require
either to be in the wheel group to be able to su.
Ubuntu is even stranger: for uni-personal installation, there is no
root password per default (none that you can type).
All is done with sudo (not su).
Whenever root level is requested by the Gui, you must provide the
"first user" password (the one which installed).
If you want su back, you need to set a password for root with "sudo
passwd root" first.

-- 
The superior man understands what is right;
the inferior man understands what will sell.
-- Confucius

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