I'm using libvirt on Debian/stretch (testing) with vagrant and the vagrant-libvirt plugin. When I import a vagrant box (jessie64.box), the resulting file permssions let anyone in the "kvm" group read the img. But when I build upon that box, only root can read it: -rw------- 1 root root 20198785024 Sep 19 18:19 buildserver_default.img -rwxr--r-- 1 libvirt-qemu kvm 2148663296 Sep 5 22:55 jessie64_vagrant_box_image_0.img How can I control those file permissions as a regular user in the libvirtd group? I need to read that image in order to use qemu-img to rebase and create a new vagrant box. The current `vagrant package` command only works with VirtualBox VMs, but its easy to make a .box if you have read access to the libvirt QEMU .img file. /etc/libvirt/storage/default.xml says: <target> <path>/var/lib/libvirt/images</path> <permissions> <mode>0755</mode> </permissions> </target> You can find the context for this work here: https://gitlab.com/fdroid/fdroidserver/issues/238 .hc -- PGP fingerprint: EE66 20C7 136B 0D2C 456C 0A4D E9E2 8DEA 00AA 5556 https://pgp.mit.edu/pks/lookup?op=vindex&search=0xE9E28DEA00AA5556