[Bug 42013] Re: [kubuntu dapper] Cannot enable administrator mode in Users&Groups administration

[Luka Renko]

Can you provide output of the following command:

  ls -l /etc/shadow

On my system it reports:
  -rw-r----- 1 root shadow 850 2006-04-29 20:44 /etc/shadow

There was a bug that changed group ownership from "shadow" (as above) to "root". Maybe you are hit by this.
In such case, running "sudo chgrp shadow /etc/shadow" may fix the problem.

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[kubuntu dapper] Cannot enable administrator mode in Users&Groups administration
https://launchpad.net/bugs/42013