bash-3.00$ whoami
nobody
bash-3.00$ cat 1.c
#include <stdio.h>

int main ()
{
  printf ("TEST string\n");
  return 0;
}
bash-3.00$ gcc -o 1 1.c
bash-3.00$ ls 1*
1 1.c
bash-3.00$ ./1
bash: ./1: Permission denied
bash-3.00$ /tmp/1
bash: ./1: Permission denied