Module Information and Dependency

Question 1

What is the analogy used for managing kernel modules?

Answer 1

Managing kernel modules is like organizing tools in a toolbox.

Question 2

What command analyzes module dependencies and generates the modules.dep file?

Answer 2

depmod

Question 3

What is the primary purpose of the depmod command?

Answer 3

To ensure the correct module loading order by creating/updating the dependency map.

Question 4

What command would you use to view the dependency list for the usbcore module?

Answer 4

cat /lib/modules/$(uname -r)/modules.dep | grep usbcore

Question 5

In the modules.dep file, what does the format <module_path>: <dependency1> [<dependency2> ...] indicate?

Answer 5

The module at <module_path> requires the listed dependency modules to be loaded first.

Question 6

What command displays all currently loaded kernel modules?

Answer 6

lsmod

Question 7

What three pieces of information does the lsmod output typically include?

Answer 7

Module name, size, and the count of other modules using it.

Question 8

Name three things the lsmod command can help you identify.

Answer 8

1. Conflicting modules. 2. Unnecessary modules. 3. Unauthorized modules (security threats).

Question 9

What command provides detailed information about a specific kernel module?

Answer 9

modinfo

Question 10

What modinfo output field gives a summary of the module’s function?

Answer 10

description

Question 11

What modinfo field lists the modules that must be loaded before this one?

Answer 11

depends

Question 12

What modinfo field shows configurable options for the module?

Answer 12

parm

Question 13

What modinfo field is important for verifying legal distribution rights?

Answer 13

license

Question 14

What are three primary uses for the modinfo command?

Answer 14

Debugging, verifying compatibility, and understanding module behavior before making changes.

Question 15

In the dependency example, which module must be loaded first: usb-storage or usbcore?

Answer 15

usbcore must be loaded before usb-storage.

Question 16

What does the command sudo depmod do?

Answer 16

It analyzes all modules and updates the system’s dependency file (modules.dep).