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authentication password forgotten?

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http://askubuntu.com – I don't have a log in password. But when I want to install any software or update it demands an authentication password which I don't know at all. I tried to reset it by using recovery mode, but when I type passwd USER which is my only account name it says that user "USER" does not exist. And when I type passwd it shows type a new password but I cant write any thing. I need help please !! (HowTos)

Danial's picture
Submitted by Danial on 01/19/2013

Stories similar to authentication password forgotten?

I had tried method in recovery mode.

passwd myusername

then getting new password I typed the new password twice

passwd:Manipulation Token Authentication Error passwd:password unchanged

Please help me change my password.

Messed up password 36 weeks 23 hours ago

I am unable to change my password even in root (recovery mode), or to unlock it. I can still access my account, but without password protection.

I am unable to change my password even in root (recovery mode), or to unlock it. I can still access my account, but without password protection.

Change user password in ubuntu 2 years 44 weeks ago

hi all, I have a netbook with ubuntu installed. I lost the user password, so tried to change it in single user mode.

The problem is when I try to change the password with command (passwd user), it says the following error:

Quote:

passwd: Authentication service cannot retrieve authentication info

I am user xyz on redhat linux VM abc.

I cannot change password.

abc:/home/xyz>passwd Changing password for user xyz. Changing password for xyz (current) UNIX password: Password changes on the command line are not supported.

If you forgot your ubuntu user password,or you have enabled root user and forgot the password,you can try following to reset the forgotten password. First,start your machine and when it boots into grub menu,select “Ubuntu GNU Linux …. (recovery mode)” (just use up/down arrow key to highlight it,not press enter).

hi all,

i am trying to change the password of a user as the same is used in various deployment scripts but when chnaging the passowrd to desired one by root user i am getting as below

Code: Changing password for user tcms. New UNIX password: BAD PASSWORD: it is based on a dictionary word Retype new UNIX password: passwd: all authentication tokens updated successfully. it is showing as al

to reset forgotten password in 12.04 LTS.

I am able to boot the computer. i choose root option and then come to password changing. they ask me to enter new UNIX password which i do type. but at last they give a command saying

AUTHENTICATION MANIPULATION ERROR and my password is unchanged.

I forgot my Ubuntu password so I booted into recovery and dropped into a root shell prompt and this is what happened:

root@username-PC:~# passwd username Enter new UNIX password: Retype new UNIX password: passwd: Authentication token manipulation error passwd: password unchanged