get the list and status of device drivers(modules) loaded

The command "lsmod" lists the loaded modules and their status. It prints the content of  /proc/modules file.

#lsmod [-h, -V]

It outputs the following columns:
Module, Size, Used by.
(name of the module; it's size; number of referring modules {use count}and list of referring modules).

Eg:
=====================

# lsmod
Module                  Size  Used by
af_packet              27392  2

======================

To unload a loaded module:

#rmmod [modulename]

rmmod  will  refuse to unload modules which are in use(use count != 0).

-w --wait option:  rmmod will isolate  the  module,  and wait  until  the module is no longer used.

-f --force option:  rmmod removes modules which are being used, or which are not designed to be removed

 or have been marked as unsafe. It has no effect unless CONFIG_MODULE_FORCE_UNLOAD was set

 when kernel was compiled.