re/un/install: virt-manager libnss-libvirt

Lang: sh 
sudo systemctl disable virtlogd.socket
sudo systemctl disable virtlockd.socket
sudo systemctl disable libvirtd.service
sudo systemctl enable libvirtd.service

libvirt-qemu

set user and group for libvirt managed qemu instances instead of the default libvirt-qemu user, useful for files created and shared by qemu VMs.

Lang: sh 
$ cat /etc/libvirt/qemu.conf
...
user = "$HOST_USER"
group = "$HOST_GROUP"
...