title: SIGKILL init process (PID 1)
body: <p>I'm facing a weird issue regarding sending signal 9 (SIGKILL) to the init process (PID 1).
  As you may know, SIGKILL can't be ignored via signal handlers. As I tried sending SIGKILL to init, I noticed that nothing was happening; init would not get terminated. Trying to figure out this behaviour, I decided to attach myself to the init process with strace too see more clearly what was happening. Now comes the weird part. If I'm "looking" at the init process with strace and send it SIGKILL, the system crashes.</p>
  
  <p>My question is why is this happening? Why does the system crash when I look at the process and why does it not crash when I'm not? As I said, in both cases I send SIGKILL to init. Tested on CentOS 6.5, Debian 7 and Arch.</p>
  
  <p>Thanks!</p>