Lxd init failed

i try lxd init in fresh ubuntu 18.04
i accept all as default
"Error: Failed to create network ‘lxdbr0’: Failed to run: dnsmasq --strict-order --bind-interfaces --pid-file=/var/lib/lxd/networks/lxdbr0/dnsmasq.pid --except-interface=lo --interface=lxdbr0 --quiet-dhcp --quiet-dhcp6 --quiet-ra --listen-address= --dhcp-no-override --dhcp-authoritative --dhcp-leasefile=/var/lib/lxd/networks/lxdbr0/dnsmasq.leases --dhcp-hostsfile=/var/lib/lxd/networks/lxdbr0/dnsmasq.hosts --dhcp-range,,1h -s lxd -S /lxd/ --conf-file=/var/lib/lxd/networks/lxdbr0/dnsmasq.raw -u lxd: dnsmasq: failed to create listening socket for Address already in use

i can’t systemctl stop dnsmasq
Failed to stop dnsmasq.service: Unit dnsmasq.service not loaded.

Dnsmasq can be launched by other system processes such as kvm (unlikely to conflict here) or network-manager.

A way to find it is to use something like
sudo ss -tapnu | grep dnsmasq | grep LISTEN -> will list the process
and then use ps fauxww | grep (pid-of-dnsmasq)

sudo ss -tapnu | grep dnsmasq | grep LISTEN -> list nothing

Some other service is listening already on lxdbr0, so LXD’s dnsmasq cannot start here.
That other service is not another dnsmasq then, therefore run this command

sudo ss -tapnu | grep ":53" | grep LISTEN

Thanks it’s working now. It was Maas occupied the port.