Comment 2 for bug 1665698

That has been my challenge this morning in figuring this out. As far as I know, I don't use it or need what it provides. I can't find anything in /etc/libvirt or even /etc or my Openstack venv that is calling toward qemu-ifup. I grepped thru /usr looking for 'qemu-ifup' and the only hits were from the /usr/share/doc/qemu-system-*/common/qemu-doc.html mentions.

I began to suspect a possible packaging issue when I saw that it is sourced from upstream Ubuntu packaging, so that's what prompted this bug:

root@ubuntu-trusty-5773:~# dpkg -S /etc/qemu-ifup
qemu-system-common: /etc/qemu-ifup
root@ubuntu-trusty-5773:~# dpkg -l qemu-system-common
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=========================================-=========================-=========================-=======================================================================================
ii qemu-system-common 1:2.5+dfsg-5ubuntu10.5~cl amd64 QEMU full system emulation binaries (common files)