title: ubuntu when core dump is not happening when program ran as root(sudo)
body: <p>when I ran a program which will cause the segmentation fault as root user , the core is not dumped.. I checked the ulimit -c and it is unlimited...But if I ran as a normal user the program is dumping the core.. </p>
  
  <pre><code>    suresh@suresh-desktop:~$ ulimit -c
      unlimited
      suresh@suresh-desktop:~$ ./main 
      Segmentation fault (core dumped)
      suresh@suresh-desktop:~$ sudo ./main 
      Segmentation fault
      suresh@suresh-desktop:~$ 
  
  
  
  
  
  
  
  
      root@suresh-desktop:~# ulimit -c unlimited
      root@suresh-desktop:~# ./main 
      Segmentation fault
  
  
      //main.c
  
          main()
          {
  
          *((int *)0xb80000) = 123;
          }   
  
  root@suresh-desktop:~# ulimit -a -S
  core file size          (blocks, -c) unlimited
  data seg size           (kbytes, -d) unlimited
  scheduling priority             (-e) 20
  file size               (blocks, -f) unlimited
  pending signals                 (-i) 16382
  max locked memory       (kbytes, -l) 64
  max memory size         (kbytes, -m) unlimited
  open files                      (-n) 1024
  pipe size            (512 bytes, -p) 8
  POSIX message queues     (bytes, -q) 819200
  real-time priority              (-r) 0
  stack size              (kbytes, -s) 8192
  cpu time               (seconds, -t) unlimited
  max user processes              (-u) unlimited
  virtual memory          (kbytes, -v) unlimited
  file locks                      (-x) unlimited
  
  
  
  
  
  
  
  
  
  
  root@suresh-desktop:~# ulimit -a -H
  core file size          (blocks, -c) unlimited
  data seg size           (kbytes, -d) unlimited
  scheduling priority             (-e) 20
  file size               (blocks, -f) unlimited
  pending signals                 (-i) 16382
  max locked memory       (kbytes, -l) 64
  max memory size         (kbytes, -m) unlimited
  open files                      (-n) 1024
  pipe size            (512 bytes, -p) 8
  POSIX message queues     (bytes, -q) 819200
  real-time priority              (-r) 0
  stack size              (kbytes, -s) unlimited
  cpu time               (seconds, -t) unlimited
  max user processes              (-u) unlimited
  virtual memory          (kbytes, -v) unlimited
  file locks                      (-x) unlimited
  </code></pre>