[Bug 1185547] Re: Removing package fails to remove user

[Chris Halse Rogers]

It's not entirely clear that the apt-cacher-ng user *should* be removed
on package removal. See
http://wiki.debian.org/AccountHandlingInMaintainerScripts for unresolved
discussion of such ☺.

It's also worth noting that the patch as written will fail if adduser is
installed *and* the apt-cacher-ng user is not a system user. You've
traded an error on reinstall for an error on removal.

I've fixed a similar problem in colord recently by just checking whether
the user exists before trying to create it in the postinst.

Finally, this does indeed seem like something that would also apply to
debian - have you filed a Debian bug or contacted the maintainer about
this?

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https://bugs.launchpad.net/bugs/1185547

Title:
  Removing package fails to remove user

Status in “apt-cacher-ng” package in Ubuntu:
  New

Bug description:
  When purging the apt-cacher-ng package, the apt-cacher-ng user is not
  removed from the system. This causes reinstalls to fail because the
  apt-cacher-ng user already exists. The package should remove the user
  when being purged.

  Workaround:
  After uninstalling, run the command:
  sudo userdel apt-cacher-ng
  Once the user is removed, the package can be installed again.

  Version affected: 12.04.1 Precise
  Package version: 0.7.2-1ubuntu2.1

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