"Linux operating system" Linux kernel insert unload module

• Open Terminal
• Input: mkdir moduletest, create a folder where files are placed
• Go to folder, CD Moduletest
• Create file: Nano hello.c, file contents are as follows:

#include <linux/init.h>#include <linux/module.h>MODULE_LICENSE("Dual BSD/GPL");staticint hello_init(void){    printk(KERN_ALERT"Hello, xiaoming\n");    return0;}staticvoid hello_exit(void){    printk(KERN_ALERT"Goodbye, xiaoming\n");}module_init(hello_init);module_exit(hello_exit);

• Create Makefile file: Nano Makefile, code as follows:

obj-m := hello.oKERNELBUILD :=/usr/src/linux-headers-3.11.0-12-genericdefault:    make -C $(KERNELBUILD) M=$(shell pwd) modulesclean:    rm -rf *.o  *.ko *.mod.c .*.cmd.tmp_versions *.order *.symvers

The path inside is different from the Linux version, you can go to the corresponding path to see

• Compile, enter make, and compile the process:
  

• Insert module: sudo insmod Hello.ko

• Delete module: sudo rmmod Hello.ko

• View Results: DMESG | grep "Xiaoming"
  
  DMESG viewing system kernel module information

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

"Linux operating system" Linux kernel insert unload module