-h
last -x shutdown
shutdown system down 4.4.0-87-generic Sat Sep 23 22:00 - 08:15 (2+10:14)
shutdown system down 4.4.0-87-generic Sat Sep 23 08:15 - 08:15 (00:00)
shutdown system down 4.4.0-87-generic Sat Sep 23 08:08 - 08:09 (00:00)
shutdown system down 4.4.0-87-generic Sat Sep 23 08:02 - 08:02 (00:00)
shutdown system down 4.4.0-87-generic Fri Sep 8 11:33 - 07:59 (14+20:26)
shutdown system down 4.4.0-87-generic Thu Sep 7 17:34 - 08:15 (14:41)
shutdown system down 4.4.0-87-generic Wed Sep 6 21:46 - 08:13 (10:27)
shutdown system down 4.4.0-87-generic Wed Sep 6 14:09 - 14:11 (00:02)
shutdown system down 4.4.0-87-generic Tue Sep 5 21:00 - 07:50 (10:49)
shutdown system down 4.4.0-87-generic Mon Sep 4 17:31 - 08:01 (14:30)
shutdown system down 4.4.0-87-generic Sat Sep 2 11:32 - 08:26 (1+20:53)
shutdown system down 4.4.0-87-generic Fri Sep 1 20:17 - 08:28 (12:11)
wtmp begins Fri Sep 1 20:17:36 2017
last -x reboot
reboot system boot 4.4.0-87-generic Tue Sep 26 08:15 - 08:30 (00:15)
reboot system boot 4.4.0-87-generic Sat Sep 23 08:15 - 22:00 (13:45)
reboot system boot 4.4.0-87-generic Sat Sep 23 08:09 - 08:15 (00:05)
reboot system boot 4.4.0-87-generic Sat Sep 23 08:02 - 08:08 (00:06)
reboot system boot 4.4.0-87-generic Sat Sep 23 07:59 - 08:02 (00:02)
reboot system boot 4.4.0-87-generic Fri Sep 8 08:15 - 11:33 (03:17)
reboot system boot 4.4.0-87-generic Thu Sep 7 08:13 - 17:34 (09:20)
reboot system boot 4.4.0-87-generic Wed Sep 6 14:11 - 21:46 (07:34)
reboot system boot 4.4.0-87-generic Wed Sep 6 07:50 - 14:09 (06:19)
reboot system boot 4.4.0-87-generic Tue Sep 5 08:01 - 21:00 (12:58)
reboot system boot 4.4.0-87-generic Mon Sep 4 08:26 - 17:31 (09:04)
reboot system boot 4.4.0-87-generic Sat Sep 2 08:28 - 11:32 (03:03)
wtmp begins Fri Sep 1 20:17:36 2017