And that’s a good thing.
But… If the box you’re issuing the command from isn’t running Ubuntu or isn’t running avahi, it doesn’t work.
If the box issuing the commend is running Windows, (unless it’s running Bonjour or an equivalent) it won’t work there either.
I just tried shutting down a Pi (running the latest emonSD image) from a machine running Debian (no avahi) and received this error message: Could not resolve hostname emonpi.local: Name or service not known
No joy with PuTTY on Windows 7 either. Even though Windows isn’t the world’s most liked OS, there are too many Windows boxes in use to just turn a blind eye to them.