title: Module not found: modprobe
body: <p>I have written a simple hello world kernel module, compiled it and install in <code>/lib/modules/kernel_version/extra/</code> path.</p>
  
  <p>With <code>insmod</code> its getting loaded properly, but with <code>modprobe</code> i am getting an error </p>
  
  <pre><code>modprobe: FATAL: Module hello_world.ko not found.
  </code></pre>
  
  <p>I have installed all the per-requisite.</p>
  
  <p>Here is Makefile to compile and install:</p>
  
  <pre><code>make -C /lib/modules/$(shell uname -r)/build M=$(PWD)  modules
  make -C /lib/modules/$(shell uname -r)/build  M=$(PWD)  modules_install
  </code></pre>
  
  <p>Please tell me how to get is done.</p>
  
  <p>Thanks in Advance. </p>