reboot   system boot  4.4.0-21-generic Thu Apr 28 17:06   still running
reboot   system boot  4.4.0-21-generic Mon Apr 25 20:32   still running
reboot   system boot  4.4.0-21-generic Mon Apr 25 20:25 - 20:31  (00:05)
reboot   system boot  4.4.0-21-generic Sat Apr 23 20:40 - 20:31 (1+23:51)
reboot   system boot  4.4.0-21-generic Sat Apr 23 19:16 - 20:39  (01:23)

23:10:41 up  6:04,  1 user,  load average: 0,00, 0,01, 0,05