Every device and every interface has an associated hotplug event, which is processed by the responsible hotplug agent. Hotplug events are triggered by the kernel when a link is established to a device or when a driver registers an interface. A hotplug event is a program call, usually /sbin/hotplug if nothing else is specified in /proc/sys/kernel/hotplug. /sbin/hotplug searches for a hotplug agent that matches the type of event. If no suitable agent is found, the program is terminated.

	Ignoring Certain Hotplug Events
To ensure that events of a particular kind are ignored, edit the file /etc/sysconfig/hotplug and enter the names of the undesired events in the variable HOTPLUG_SKIP_EVENTS.