title: Can't run two times execl
body: <p>If I try to executes these commands:</p>
  
  <pre><code>int main(int argc, char* argv[])
  {
      execl("/bin/echo","echo","list ","of", "files:\n",NULL);
      execl("/bin/ls","ls","-al",NULL);
      return 0;
  }
  </code></pre>
  
  <p>Only the first one gets executed, why?</p>