Vnx-install-modify-qemuconf

If you have just installed libvirt, the parameters to be modified should be commented in the configuration file. So, you just can copy/paste this commands to modify it:

cat << EOF >> /etc/libvirt/qemu.conf
security_driver = "none"
user = "root"
group = "root"
cgroup_device_acl = [
   "/dev/null", "/dev/full", "/dev/zero",
   "/dev/random", "/dev/urandom",
   "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
   "/dev/rtc", "/dev/hpet", "/dev/vfio/vfio", "/dev/net/tun"
]
EOF