printk() doesn't print in /var/log/messages

Question

My OS Ubuntu 12.04. I wrote this Kernel Module and i use insmod and rmmod command but there isn't anything in /var/log messages. how can i fix this problem?

/*  
*  hello-1.c - The simplest kernel module.
*/
#include <linux/module.h>   /* Needed by all modules */
#include <linux/kernel.h>   /* Needed for KERN_INFO */

int init_module(void)
{
   printk(KERN_INFO "Hello world 1.\n");

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

 void cleanup_module(void)
 {
   printk(KERN_INFO "Goodbye world 1.\n");
 }

Answer 1

Check whether syslog daemon process is running, since this is the process which copies printk messages from kernel ring/log message buffer to /var/log/messages if I am correct. printk messages can be seen using dmesg utility/command or messages will be in /var/log/messages. If correct loglevel is set then printk messages will be displayed on the console right away, no need to use dmesg or no need to check in /var/log/messages. printk debug messages can also be part of /var/log/syslog.