Identity

Daemon: avahi-daemon
Unit: avahi-daemon.service
Config: /etc/avahi/avahi-daemon.conf
Service definitions: /etc/avahi/services/ (XML .service files)
Port: 5353/UDP (mDNS multicast — 224.0.0.251)
Distro install: apt install avahi-daemon avahi-utils / dnf install avahi avahi-tools
NSS plugin: libnss-mdns (Debian/Ubuntu) / nss-mdns (Fedora) — required for .local resolution

Key Operations

Operation	Command
Check daemon status	`systemctl status avahi-daemon`
Browse all advertised services	`avahi-browse --all --resolve --terminate`
Browse a specific service type	`avahi-browse --resolve --terminate _http._tcp`
Resolve a `.local` hostname	`avahi-resolve --name hostname.local`
Resolve an IP to `.local` name	`avahi-resolve --address 192.168.1.x`
Show what this host publishes	`avahi-browse --all --resolve --terminate \| grep "$(hostname)"`