Comment 2 for bug 993670

Here is a google translate attempt at the problem, looks like /etc/passwd was locked by something and then whoopsie and later down landscape-common failed when they tried to add their users.

Are setting whoopsie (0.1.32) ...
useradd: can not lock / etc / passwd; please try again later.
adduser: `/ usr / sbin / useradd-d / nonexistent-g whoopsie-s / bin / false-u 123 whoopsie 'returns an error code. Are free.
dpkg: error processing whoopsie (- configure):
  subprocess installed post-installation script returned error exit status 1
Setting up landscape-common (12.04.3-0ubuntu1) ...
useradd: can not lock / etc / passwd; please try again later.
adduser: `/ usr / sbin / useradd-d / var / lib / landscape landscape-g-s / bin / false-u 123 landscape 'returned error code 1. Are free.
dpkg: error processing landscape-common (- configure):
  subprocess installed post-installation script returned error exit status 1