Chap7 Kernel Modules

Question 1

kernel modules

Answer 1

They incorporate device drivers to control hardware either inside the system or attached peripherally.

Question 2

LKM

Answer 2

Loadable Kernel Module

Question 3

LKM device drivers

Answer 3

For a specific piece of hardware like ethernet cards, kernel uses it to communicate

Question 4

LKM filesystem drivers

Answer 4

interprets the contents of a filesystem as files and directories and such. IE. for ext2 filesystem type, MS-DOS type, and NFS

Question 5

LKM system calls

Answer 5

read a file, to create a new process, shutdown a system. You can invent a system call of your own and install it as an LKM.

Question 6

lsmod

Answer 6

list loaded modules

Question 7

insmod

Answer 7

directly load modules

Question 8

rmmod

Answer 8

directly remove modules

Question 9

modprobe

Answer 9

load or unload modules, using a pre-built module database with dependency information

Question 10

depmod

Answer 10

rebuild the module dependency database; needed by modprobe and modinfo

Question 11

modinfo

Answer 11

display info about a module

Question 12

load module

Answer 12

$ sudo /sbin/modprobe module_name

Question 13

remove module

Answer 13

$ sudo /sbin/modprobe -r module_name

Question 14

/sys/modules

Answer 14

Information about modules

Question 15

/etc/modprobe.d

Answer 15

is a directory to control parameters when loading with modprobe. IE. aliases, blacklist