Whenever libvirt is upgraded on a Debian system, the user will be prompted along the lines of Configuration file '/etc/libvirt/qemu/networks/default.xml' ==> Modified (by you or by a script) since installation. ==> Package distributor has shipped an updated version. What would you like to do about it ? Your options are: Y or I : install the package maintainer's version N or O : keep your currently-installed version D : show the differences between the versions Z : start a shell to examine the situation The default action is to keep your current version. *** default.xml (Y/I/N/O/D/Z) [default=N] ? d --- /etc/libvirt/qemu/networks/default.xml 2020-08-04 12:57:25.450911143 +0200 +++ /etc/libvirt/qemu/networks/default.xml.dpkg-new 2020-08-03 22:47:15.000000000 +0200 @@ -1,19 +1,11 @@ -<!-- -WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE -OVERWRITTEN AND LOST. Changes to this xml configuration should be made using: - virsh net-edit default -or other application using the libvirt API. ---> - <network> <name>default</name> - <uuid>612a2cab-72fb-416d-92bc-4d9e597bfb63</uuid> - <forward mode='nat'/> - <bridge name='virbr0' stp='on' delay='0'/> - <mac address='52:54:00:1f:03:79'/> - <ip address='192.168.122.1' netmask='255.255.255.0'> + <uuid>d020b839-4379-492c-aa74-eab7365076e6</uuid> + <bridge name="virbr0"/> + <forward/> + <ip address="192.168.122.1" netmask="255.255.255.0"> <dhcp> - <range start='192.168.122.2' end='192.168.122.254'/> + <range start="192.168.122.2" end="192.168.122.254"/> </dhcp> </ip> </network> The UUID situation should probably be handled the same way it is in the spec file by stripping it, and in general we could behave much better towards users, but one part of the diff that immediately stands out is that some lines are highlighted not because they are semantically different, but simply because they use different types of quotes around attributes. Since the canonical version of all libvirt XML documents (as returned by the various vir*GetXMLDesc() APIs) as well as the on-disk representations use single quotes, let's use the same for configuration files we install as well. Signed-off-by: Andrea Bolognani <abologna(a)redhat.com&gt; --- src/network/default.xml.in | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/network/default.xml.in b/src/network/default.xml.in index d7241d0c16..08a3632eb6 100644 --- a/src/network/default.xml.in +++ b/src/network/default.xml.in @@ -1,10 +1,10 @@ <network> <name>default</name> - <bridge name="virbr0"/> + <bridge name='virbr0'/> <forward/> - <ip address="192.168.122.1" netmask="255.255.255.0"> + <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> - <range start="192.168.122.2" end="192.168.122.254"/> + <range start='192.168.122.2' end='192.168.122.254'/> </dhcp> </ip> </network>