### About the Driver Module

The Linux RealPort driver package consists of a number of utilities in support of two core components; dgrp.o, the RealPort driver module and drpd, the RealPort driver. For more information on the RealPort driver, see About the RealPort Driver.

The dgrp.o driver is a standard Linux module and can be manipulated with the standard tools such as lsmod, insmod, rmmod, etc. It should be unnecessary to execute any of these commands since most operations can be performed with the dgrp_cfg_node program. See Managing Digi Devices with dgrp_cfg_node.

Use this command to determine whether the module is currently loaded:

> `lsmod | grep dgrp`

One effect of the loading of the driver module is the creation of a directory tree in the /proc file system. Files and directories under the /proc/dgrp directory are used by the RealPort tools to maintain the driver. One file in particular, /proc/dgrp/config, can be examined to determine the current configuration and state of the Digi devices attached to the driver.

For more information about the driver module, see the dgrp man page which is installed with the driver package.