“FATAL: Module not found error” using modprobe

Question

I have a problem with modprobe command... I compiled the hello world module and loaded it with insmod, it works fine and when I do lsmod,

Answer 1

Insert this in your Makefile

 $(MAKE) -C $(KDIR) M=$(PWD) modules_install                      

 it will install the module in the directory /lib/modules//extra/
 After make , insert module with modprobe module_name (without .ko extension)

OR

After your normal make, you copy module module_name.ko into   directory  /lib/modules//extra/

then do modprobe module_name (without .ko extension)