Changing root password does not change sudo password

Question

I'm trying to change the password that get's asked when doing sudo. I'm in Ubuntu. Doing 'sudo passwd' or 'sudo passwd root' does give me the two new password questions, and it successfully changes passwords. But then I can still use my old password when doing sudo again for something else. I do have a user with the exact same password, don't know if that makes a difference. I enabled root user, and I can see the new password does work with the root user.

So root password is changed but not the password for sudo.

How to change sudo password?

Answer 1

You're changing root's password. sudo wants your user's password.

To change it, try plain passwd, without arguments or running it through sudo.

Alternately, you can issue:

$ sudo passwd <your username>

Answer 2

The password you use for sudo is the password of your own account, not the root account. sudo is used to grant you access to commands that need to be executed as root without giving you root access directly. To change your own password, use passwd without sudo.