Hi all, I am in the initial hard steps of learning the nuances of kernel programming, as to begin what are all the modules (header files) to use its data-structures be included to go about, as I tried this source: src: http://tldp.org/LDP/lkmpg/2.6/html/x121.html /* * 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\n"); } as compilation followed this: box@x86:~$ cc kernel_hello.c kernel_hello.c:3: fatal error: linux/module.h: No such file or directory compilation terminated. -- Thanks and Regards, Srinidhi. ---- All our knowledge has its origins in our perception. -- Leonardo da Vinci. ---- Tell me and I forget. Teach me and I remember. Involve me and I learn. -- Benjamin Franklin.