Ubuntu
shadow package

how can I get may authentication password to work / it worked fine until yesterday

Asked by jgrendon

I get a dialog box stating "Enter your password to perform administrative task". My password has worked all this time,now it just doesn't work as of today. This has happened once before on another computer, and luckily someone posted the same question.
The answer was a series of steps using the terminal and it worked. I can not find the post nor my notes. Does someone know how?

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marcobra (Marco Braida) (marcobra) said : 		#1

I don't remember user and password what i can do

You can do this: http://www.psychocats.net/ubuntu/resetpassword

or

To discover your user and restore (change) the password you can:

Start the pc the when you see the GRUB row...

Press ESC.

Press "e" for edit.

Highlight the line that begins kernel ………, and press "e"

Go to the very end of the line, add rw init=/bin/bash

press enter, then press "b" to boot your system.

Your system will boot up to a passwordless root shell.

Type in grep -i 1000 /etc/passwd

The system must show a row with your user name at the start of the row
for example:
danilo:x:1000:1000:ubuntu,,,:/home/danilo:/bin/bash

Here my user is danilo

Then to change your user password type in:

passwd username

or

passwd -d username

change username with your real user

Set your password.

Type in:

reboot

or

reboot -f

Hope this helps

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