Ubuntu
adduser package

  1. Bug #432964
  2. Comment #17

Comment 17 for bug 432964

Revision history for this message
Tuomas Aavikko (taavikko) wrote : Re: [Bug 432964] Re: usermod fails: "cannot lock /etc/passwd"

2009/10/10 David Henningsson <email address hidden>

> I have also encountered this bug and tried to nail it down. It seems
> like the following files have been left:
>
> /etc/passwd.lock
> /etc/passwd+
> /etc/shadow.lock
>
> I renamed these files and now I can successfully create users again.
>

Confirmed.
By removing these .lock files I can change my name, with usermod or
users-admin.
this also fixes my ability to start guest-session.