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-   -   $su, Authentication Failure (https://www.linuxquestions.org/questions/ubuntu-63/%24su-authentication-failure-671622/)

Eilya 09-22-2008 01:26 PM

$su, Authentication Failure
 
Hi Dear friends,

I want to know why I can not login in bash in condition that I can login to the Interface? I use the same username and password, so why I have Authentication Failure.

Thanks,
Eilya

Matir 09-22-2008 02:14 PM

Are you attempting to login at a login prompt, or via su as your subject implies? Only some users are allowed to su: having a password is not sufficient.

Eilya 09-22-2008 02:31 PM

what should I do????
 
I can do everything in graphical mode, but by same user pass, I can not do that, this system is single user, and I have the administrator permission:) I didn't have similar problem in suse distro.

Regards,
Eilya

Matir 09-22-2008 02:40 PM

So you have a login prompt, and type in the username and password, and it doesn't work, but logging in as that user from X does work?

Eilya 09-26-2008 05:18 PM

Yes, I can login to interface, and using administration graphical tools, but I can not login in bash. what's the problem?

Eilya 10-02-2008 05:48 PM

ANy IdeA????????

Matir 10-02-2008 08:12 PM

You never clarified your concerns. You cannot log into bash: bash contains NO authentication mechanisms. Are you using 'su' from a bash session to attempt to switch user to root? Are you logging in on a Virtual Terminal (console)?

Maybe you could copy/paste the exact text you see so we can see exactly what is happening.

Eilya 10-13-2008 04:58 PM

Dear Matir,
I login to Virtual Terminal by my user and password, then when I want to use Bash I type: $su but the same user and pass doesn't work in this part.
Regards,
Eilya

Matir 10-13-2008 05:38 PM

Some distributions require that you be in the wheel group in order to use su from the console. Check your local pam configuration to see if pam_wheel.so is required for suing.

dopla 10-14-2008 05:41 AM

To set the root password:
$ sudo su (if this asks for password, enter YOURS. You must be in the sudoers file by default).
$ passwd

Then later on, to log in as root (On Virtual Terminal)
username: root
password: <The One You Set As Above>

Does this help?


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