Below is the source code of a C program to create a Zombie process in Linux and analyse it.

vim create_zombie_process.c

#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>

int main ()
{
  pid_t child_pid;

  child_pid = fork ();
  if (child_pid > 0) {
    sleep (60);
  }
  else {
    exit (0);
  }
  return 0;
}

Compile the C source code into an executable program:

gcc create_zombie_process.c

Start the program:

./a.out

Open a second Terminal and view the process list. You will now see a process with STAT: Z and the text: defunct

ps au --forest