real: 0m0.173s, user: 0m0.066s, sys: 0m0.025s
  PID TTY          TIME CMD
   30 ttyS0    00:00:00 bash
   35 ttyS0    00:00:00 bash
   36 ttyS0    00:00:00 sleep
   37 ttyS0    00:00:00 ps