pgrep inetd shows the process and
pkill -HUP inetd reloads it.
It is necessary to inform inetd, because it starts the service daemons in inetd.conf on demand.
-1 should be identical to -HUP
When...
You need to restart or reload the inetd/xinetd process so that it reads the new inetd.conf or inetd.d files.. You can also give a kill -HUP to the inetd/xinetd process.