===== Module compilation Linux =====

Install dependencies:
<code>
yum install gcc kernel-devel
</code>

Create module source file:
<code>
/*
 *  goku.c - The simplest kernel module.
 */
#include <linux/module.h>       /* Needed by all modules */
#include <linux/kernel.h>       /* Needed for KERN_INFO */
MODULE_LICENSE("GPL");
int init_module(void)
{
        printk(KERN_INFO "Dragon Ball GT...\n");

        /*
         * A non 0 return means init_module failed; module can't be loaded.
         */
        return 0;
}

void cleanup_module(void)
{
        printk(KERN_INFO "Goku SSJ4 es la mejor transformacion...\n");
}
</code>
Create the make file:
<code>
obj-m += goku.o

all:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules

clean:
	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
</code>
Compile the module:
<code>
make
</code>

Test your module:
<code>
lsmod|grep goku
sudo insmod goku.ko
lsmod|grep goku
</code>

Great!... but what does? Check:
<code>
sudo dmesg
</code>
You will see in the output:
<code>
[ 7347.651869] Dragon Ball GT...
</code>

Unload the module:
<code>
sudo rmmod hello.ko
lsmod|grep hello
</code>

Check:
<code>
sudo dmesg
</code>
You will see in the output:
<code>
[ 7459.206258] Goku SSJ4 es la mejor transformacion...
</code>
==== Sources ====
  * https://tldp.org/LDP/lkmpg/2.6/html/x121.html
  * https://github.com/volatilityfoundation/volatility/pull/813/commits/220f9df1e636f5772ec0f0cd1702ce4e6cfa9849