Ubuntu for Pi (arm) mDNSMarch 18, 2021 | Stack
Resently I experienced that my pi's with an ubuntu install did'nt resolve in my routers DNS server. The following mDNS install on the pi will solve that problem.
sudo hostnamectl set-hostname [your-pi-name]
sudo apt install avahi-daemon
and a restart of the daemon:
sudo service avahi-daemon restart