You can run the lsmod(8) to display the list of currently loaded modules in user memory.

riaan@linux:~> lsmod
Module                  Size  Used by    Not tainted
sr_mod                 14616   0 (autoclean) (unused)
snd-mixer-oss          15576   1 (autoclean)
videodev                6272   0 (autoclean)
isa-pnp                32712   0 (unused)
usbserial              19836   0 (autoclean) (unused)
....	
....
....
ne2k-pci                5248   1
8390                    6608   0 [ne2k-pci]
ide-scsi               11056   0
scsi_mod              100788   2 [sr_mod ide-scsi]
ide-cd                 32416   0
cdrom                  29216   0 [sr_mod ide-cd]
nls_iso8859-1           2844   2 (autoclean)
ntfs                   80300   2 (autoclean)
lvm-mod                64996   0 (autoclean)
reiserfs              217908   1
            

You can use the insmod(8) or modprobe(8) commands to load a module from the /lib/modules directory structure into user memory for use by the parent.

The advantage of using modprobe over insmod to load modules, is that modprobe will consult a dependency file /lib/modules to determine which other drivers need to be loaded before the requested module.

To unload a module from user memory you can use the rmmod(8) or modprobe -r commands. The module may not be in use by the kernel or the attempt at removal will fail.

modinfo(8) displays important information about a module, including its configuration parameters depmod(8) this command analyses all the module binaries under /lib/modules and builds a dependency file in this same directory structure.