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New user trying to update software but don't know the authentication pass word

user273756
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3 Answers3

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The authentication password is your own password.

You can change it in system preferences or using passwd.

Cody
  • 364
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the authentication password is your current user password.

if you want to change the password to be sure use this command :

sudo passwd user_name

then click enter it will ask you for the new password and ask you to verify it

if you want to activate root user just use this command :

sudo passwd

without writing a user name and it will set password for root user and activate it then you login with it in cmd by using this command :

sudo su -

and by then you wont use sudo any more and can use the root password for authentication

Khaled Moustafa
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  • Start your computer
  • In a grub menu which appear by default when your start your computer, select "advanced options for ubuntu"
  • After that, select the option which states things like "recovery mode"
  • Now You will be shown the recovery menu. In the recovery menu Select “root – Drop to root shell prompt

  • Then command prompt will appear at the bottom of the screen. Type this following in the command prompt to show all the user of your computer

    ls /home

  • Next type the following command at command prompt to mount with permissions

    mount -rw -o remount /

  • Finally type passwd username in the command prompt. For example if the username you selected is Kevin, the command will be

    passwd Kevin

  • It will ask you to reset password

    Enter new UNIX Password:

    Retype new UNIX Password:

  • Make sure you see this message

    Passwd:Password updated successfully

  • Just it ! Now restart your computer by type reboot in the command prompt

Liso
  • 15,677