Public bug reported:

I have just spent a day and a half trying to find out why my install of
13.10 won't access the network. Finally, with help from another
computer, I find that apparmor is denying /usr/lib/NetworkManager/nm-
dhcp-client.actions.

The first attempt at an upgrade (due to the withdrawal of support for
13.04 - a bit quick, n'est-ce pas?) was  a normal upgrade in place. This
failed and the system, that has run well for years through many
upgrades, would not start.  Then I did a clean install into the
partition using a cd I had. This starts, and appears fine, except it
won't connect to the network.

Investigating logs (once I discovered how to do that) I find that the
apparmor application is denying access to dhcp.

Fine, so remove apparmor. According to
http://ubuntuguide.org/wiki/Ubuntu:Saucy this is simple. But doesn't
work. And it needs a network to complete.

So next to use aa-complain to stop apparmor blocking. That needs
apparmor-utils installed (not part of the distribution it seems). Easy,
so download using apt-get on another machine using -d option, transfer
across, bingo.

Except it isn't. Downloading and transferring leads to an ever-
increasing list of unmet dependencies.  And files that are already on
the second machine don't get downloaded anyway so can't be obtained.

End result, a machine that prevents itself from accessing the network so
it can fix itself. And no visible workaround.

So I don't know exactly what is at fault - the release strategy of only
providing a bare machine without the tools to fix problems; the apparmor
application that is causing this iatrogenic problem; some other thing I
can only guess at.

I don't think there is anything special about my machine and certainly
there is nothing non-standard about any settings to do with apparmor as
I have never touched it.

There needs to be a simple way of disabling apparmor without installing
any new software into a fresh install, and it must work.

** Affects: apparmor (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1277042

Title:
  13.10 apparmor denies dhcp

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