7.6. Testing the Module

Try these first

1. 1.

   What command do you use to load a kernel module?

   Hint

   Look for the command related to inserting modules.

2. 2.

   What is the purpose of the dmesg command?

   Hint

   Think about what helps with debugging in Linux.

3. 3.

   What command is used to load a kernel module?

   • sudo rmmod sensor
   • sudo mknod /dev/ranging_sensor
   • sudo insmod sensor.ko

   Hint

   This command is essential to begin testing.

4. 4.

   True or False: It is necessary to create a device file before you can read data from the kernel module.

   • True
   • False

   Hint

   Think about how users interact with modules.

5. 5.

   If you try to read the distance from the device file before loading the module, what do you expect to happen? Explain your reasoning.

   Hint

   Think about the relationship between the module and the device file.

6. 6.

   Explain how to handle errors encountered during module loading. What steps would you take?

   Hint

   Consider the debugging tools available in Linux.