Xinetd is a fairly fancy service dispatcher. It's available as a package. Most Ubuntu installations only need the features of the more basic inetd program (if at all), so that's what you get by default. If you need xinetd's advanced features, install it explicitly.
It's just not installed by default. Install it by running:
Xinetd is a fairly fancy service dispatcher. It's available as a package. Most Ubuntu installations only need the features of the more basic inetd program (if at all), so that's what you get by default. If you need xinetd's advanced features, install it explicitly.