[gentoo-user] PAM problem

[gentoo-user] PAM problem

[Jean Magnan de Bornier]

Hi all,

and a happy nerw year!

My problem with PAM has several manifestations:
1/ I cannot login as root (I know I should not do that btw):
"Login incorrect"  (but I know my root password!)
2/ Using sudo su as a user:

12:32 jean@borixe /home/jean % sudo su
Password:
su : Authentication service cannot retrieve authentication info.
(Ignoré)
[root@borixe:/home/jean]# 

3/ So I can do *some* admin jobs, but *not all;* specifically I cannot create a
new user:

[root@borixe:/home/jean]# useradd jojo
useradd : échec de la méthode d'authentification PAM

(ie, the pam auth method fails)

I guess it is the same problem causing these behaviours, but am far from
being an expert on that, so any help will be welcome!
TIA
-- 
  Jean Magnan de Bornier             |        Cours Victor Hugo
  e-mots: jean at bornier.net        |        13980 Alleins   France
  T 08 70 39 34 03                   |        P 06 09 17 35 87



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Re: [gentoo-user] PAM problem

[Daniel Iliev]

Jean Magnan de Bornier wrote:
> Hi all,
>
> and a happy nerw year!
>
> My problem with PAM has several manifestations:
> 1/ I cannot login as root (I know I should not do that btw):
> "Login incorrect"  (but I know my root password!)
> 2/ Using sudo su as a user:
>
> 12:32 jean@borixe /home/jean % sudo su
> Password:
> su : Authentication service cannot retrieve authentication info.
> (Ignoré)
> [root@borixe:/home/jean]# 
>
> 3/ So I can do *some* admin jobs, but *not all;* specifically I cannot create a
> new user:
>
> [root@borixe:/home/jean]# useradd jojo
> useradd : échec de la méthode d'authentification PAM
>
> (ie, the pam auth method fails)
>
> I guess it is the same problem causing these behaviours, but am far from
> being an expert on that, so any help will be welcome!
> TIA
>   


As I see it, you have to:
- boot from a CD
- mount your gentoo
- chroot into it
- change root password by "passwd"
- reinstall pam by "emerge -1 sys-libs/pam"

 Note that the last step requires a working connection to The Internet.

-- 
Best regards,
Daniel


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Re: [gentoo-user] PAM problem

[Arturo 'Buanzo' Busleiman]

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Daniel Iliev wrote:
> - reinstall pam by "emerge -1 sys-libs/pam"
> 
>  Note that the last step requires a working connection to The Internet.

Only if the required files are not present in /usr/portage/distfiles.

- --
Arturo "Buanzo" Busleiman - Consultor Independiente en Seguridad Informatica
¿No sabés a dónde ir a comer o tomar algo? Visitá www.vivamoslavida.com.ar

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Re: [gentoo-user] PAM problem

[Jean Magnan de Bornier]

Le 07 janvier à 13:16:56 Daniel Iliev <danny@ilievnet.com> écrit notamment:

| Jean Magnan de Bornier wrote:
| > Hi all,
| >

[...]


>
| As I see it, you have to:
| - boot from a CD
| - mount your gentoo
| - chroot into it
| - change root password by "passwd"
| - reinstall pam by "emerge -1 sys-libs/pam"
>
|  Note that the last step requires a working connection to The Internet.


Thanks Daniel and Arturo; unrfortunately I have some hardware problem on
this machine (cdrom out of use), so I'll have to repair that first before
I can try your solution  :-(

THX again
-- 
  Jean Magnan de Bornier             |        Cours Victor Hugo
  e-mots: jean at bornier.net        |        13980 Alleins   France
  T 08 70 39 34 03                   |        P 06 09 17 35 87

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Re: [gentoo-user] PAM problem

[Arturo 'Buanzo' Busleiman]

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Jean Magnan de Bornier wrote:
> Thanks Daniel and Arturo; unrfortunately I have some hardware problem on
> this machine (cdrom out of use), so I'll have to repair that first before
> I can try your solution  :-(

Absolutely not.

It might be possible to obtain a root login without ever logging in.

Reboot the system.

If you are using LILO:

Choose your kernel. Append " init=/bin/sh" and press enter. You should get a "#" prompt in a while.

If you are using GRUB:

Press "e", then select de kernels parameters, and press "e" again. Append " init=/bin/sh". Press
enter. Press "b" to boot it. Same results.

Now, that's pretty much like chrooting to /mnt/gentoo when installing. Run env-update && source
/etc/profile.

Now emerge pam, change your root password (or remove the hash altogether from /etc/shadow), etc, etc.

Hope it helps.

- --
Arturo "Buanzo" Busleiman - Consultor Independiente en Seguridad Informatica
¿No sabés a dónde ir a comer o tomar algo? Visitá www.vivamoslavida.com.ar

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Re: [gentoo-user] PAM problem

[Ernst Herzberg]

On Sunday 07 January 2007 12:43, Jean Magnan de Bornier wrote:
> Hi all,
>
> and a happy nerw year!
>
> My problem with PAM has several manifestations:
> 1/ I cannot login as root (I know I should not do that btw):
> "Login incorrect"  (but I know my root password!)
> 2/ Using sudo su as a user:
>
> 12:32 jean@borixe /home/jean % sudo su
> Password:
> su : Authentication service cannot retrieve authentication info.
> (Ignoré)
> [root@borixe:/home/jean]#

At this point run
[root@borixe:/home/jean]# pwconv

Maybe that could fix it.

<earny>
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Re: [gentoo-user] PAM problem

[Jean Magnan de Bornier]

Le 08 janvier à 14:37:16 Ernst Herzberg <list-gentoo-user@net4u.de> écrit notamment:

| On Sunday 07 January 2007 12:43, Jean Magnan de Bornier wrote:
| > Hi all,
| >
| > and a happy nerw year!
| >
| > My problem with PAM has several manifestations:
| > 1/ I cannot login as root (I know I should not do that btw):
| > "Login incorrect"  (but I know my root password!)
| > 2/ Using sudo su as a user:
| >
| > 12:32 jean@borixe /home/jean % sudo su
| > Password:
| > su : Authentication service cannot retrieve authentication info.
| > (Ignoré)
| > [root@borixe:/home/jean]#
>
| At this point run
| [root@borixe:/home/jean]# pwconv
>
| Maybe that could fix it.
>

Indeed!
Thank you, and also to Arturo (I won't try your tip but I keep it in mind
for more hard times :-) )

cheers,
-- 
  Jean Magnan de Bornier             |        Cours Victor Hugo
  e-mots: jean at bornier.net        |        13980 Alleins   France
  T 08 70 39 34 03                   |        P 06 09 17 35 87

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