.BR udev (8)
instance is executed in the background. All further events for the same device
are delayed until the execution is finished. This way it will never run more
-than one instance for a single device.
+than one instance for a single device at the same time.
.br
.B udevd
receives the events from
.B udevsend
which is called by
-.BR hotplug (8)
-
+.BR hotplug (8).
+If
+.B udevd
+isn't already running,
+.B udevsend
+will start it.
.SH "SEE ALSO"
-.BR udev (8)
+.BR udev (8), " hotplug" (8)
.SH AUTHORS
.B udevd
was developed primarily by Kay Sievers <kay.sievers@vrfy.org>, with much help