PPOS: system starting
PPOS: system started (uptime 0 ms)
user: inicio
	ping: inicio
	ping: 0
		pong: inicio
		pong: 0
	ping: 1
		pong: 1
	ping: 2
		pong: 2
	ping: 3
		pong: 3
	ping: fim
		pong: fim
user: fim
PPOS: system stopping
PPOS: system stopped (uptime 0 ms)