Unable to create a core file for my crashed program

Question

I am using Ubuntu 12.04 LTS. I wrote a simple program as follows to create crash

// null.c
#include

int main()
{
   int *p = NULL;
   int k=*p;
          


        

Answer 1

Your real question appears to be not "where is my core dump", but rather "how can I modify /proc/sys/kernel/core_pattern".

sudo bash -c 'echo core.%e.%p > /proc/sys/kernel/core_pattern'

should do the trick.