su - Authentication failure - reinstall fedora ?

[Angelo Moreschini]

Hi,

I tried to use the "single-user-mode" but I had problem.
Typing "e" from the interactive menu (to choose the OS) I get the message:
*[0.000000] tsc: FAST  TSC  CALIBRATION FAILED.*

In the following line I got the prompt, but was not able to type anything
there (on the screen).

Can be that the actual installation is not good.. ?
(also I am not able to login as root ... the message that I get is "login
incorrect").

What do you think that I can do?

Thank you

Angelo




On Sat, Aug 30, 2014 at 11:49 AM, KW <kilowattradio at comcast.net> wrote:

>
>
> On 08/30/2014 01:13 AM, Angelo Moreschini wrote:
> > Hi, after that I installed fedora 20, I am not able to get the
> > login as su. When I try to sign me as super user, I always get the
> > answer "Authentication failure".
> >
> > I don't think that I really type wrong the password that I set at
> > install time:/I typed it twice/. Rather I think that they are some
> > funny characters inside it.
> >
> > So I lost the hope to try to guess the password and I think to re
> > install Fedora.., but I have a problem.
> >
> > My computer is dual boot with Windows XP and I am not sure how
> > uninstall Grub (how to manage the MBR when to the computer start)
> > before to uninstall Fedora... Some time ago I tried to fix this
> > problem using Windows in recovery mode (command fixboot) and, at
> > last, I had to reinstall also Windows XP (further that Fedora)..
> >
> > Can I have an advice how  to arrange the dual boot on my computer,
> > before to uninstall Fedora??
> >
> > Thank you regards
> >
> > Angelo
> >
> >
> >
> Hi you do not have to reinstall Fedora to reset the super user or root
> account password. You need to boot into single user mode then type
> passwd at the prompt then enter a new password.
>
> Here are the instructions for single user mode:
> <
> http://docs.fedoraproject.org/en-US/Fedora/13/html/Installation_Guide/s1-rescuemode-booting-single.html
> >
>
>
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