The Avahi mDNS/DNS-SD daemon implements Apple's Zeroconf architecture (also known as "Rendezvous" or "Bonjour").
After installing avahi-daemon it may not start. To fix this you may need to run
service messagebus start
Service types are defined in
Correctly formatted and named files in
/etc/avahi/services/whatever.service are loaded on the fly, no need to restart
avahi-daemon. If your service doesn't immediately show up, check syslog for errors.
<?xml version="1.0" standalone='no'?><!--*-nxml-*--> <!DOCTYPE service-group SYSTEM "avahi-service.dtd"> <service-group> <name replace-wildcards="yes">%h</name> <service> <type>_ssh._tcp</type> <port>22</port> </service> <service> <type>_http._tcp</type> <port>80</port> </service> </service-group>