usbmgr | user-mode daemon which loads/unloads USB kernel modules | Mehr ...
When USB devices connect into or disconnect from a USB hub, the usbmgr works as follows, according to configuration: . a) Load and unload Linux kernel modules. b) Execute scripts to setup USB devices. . usbmgr is available under linux kernels having "/proc/bus/usb" and it is suitable for specific needs regarding USB devices. . This software was made for 2.4 kernels, when USB support was inmature, and is no longer developed. For wider and modern support of plugable devices you may want to install either hotplug or udev packages.