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


my os ubuntu 12.04. wrote kernel module , use insmod , rmmod command there isn't in /var/log messages. how can fix problem?

/*   *  hello-1.c - simplest kernel module. */ #include <linux/module.h>   /* needed modules */ #include <linux/kernel.h>   /* needed kern_info */  int init_module(void) {    printk(kern_info "hello world 1.\n");      /*      * non 0 return means init_module failed; module can't loaded.      */     return 0;  }   void cleanup_module(void)  {    printk(kern_info "goodbye world 1.\n");  }

check whether syslog daemon process running, since process copies printk messages kernel ring/log message buffer /var/log/messages if correct. printk messages can seen using dmesg utility/command or messages in /var/log/messages. if correct loglevel set printk messages displayed on console right away, no need use dmesg or no need check in /var/log/messages. printk debug messages can part of /var/log/syslog.


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