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I am trying to change root password in my Ubuntu system.

This is what I did:

ashot@ashot-desktop:~$ sudo passwd root 
passwd: Authentication token manipulation error 
passwd: password unchanged

How do I change root password in Ubuntu?

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Please do take the time and read the answers to this question: Why is it bad to run as root? – Takkat May 13 '13 at 18:32

5 Answers 5

Usually there is no need to set a root password. See:

To set or change your (root) password:

sudo -i

To lock it again

sudo passwd -dl root
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When you use sudo your already accessing root you dont have to specify root.

sudo passwd

If your trying to do this from recovery root you should:

mount -rw -o remount / passwd

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If 'ashot' is your root account, don't call 'sudo passwd'. I've been doing that for the past few months and it wouldn't change my password.

To change my password, I had to call 'passwd' without 'sudo'. Otherwise, the password modification is not taken account of.

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I installed a .deb file which created for pardus, when i install this package to ubuntu, my ubuntu is gone, i had never been super user also couldn't use passwd to change password.
I got the same error :

passwd: Authentication token manipulation error 
passwd: password unchanged

Try this steps;

- restart ubuntu, open it recovery mode
- drop root
- upgrade your ubuntu to a new version

This solved my problem, i hope it helps you too.

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Possibly /etc/passwd and /etc/shadow don't match.

Try to use command pwconv.

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