I would like to see the start/stop times of a Linux PC.
I found this command, but the output is wrong:
last reboot -F
reboot system boot 4.15.0-46-generi Thu Mar 14 10:04:27 2019 - Thu Mar 14 15:31:11 2019 (05:26)
That's not true. Instead of 10:04 it is 09:04.
See related question: https://askubuntu.com/questions/854567/last-reboot-is-missing-one-hour/859782
How can I see the correct start/stop times on Ubuntu 18.04?
# timestamps corresponds to your current timezone
user@node:~$ journalctl --list-boots
-3 0f2fcb9569384a2aa2d5492505f86cda Tue 2018-11-27 16:45:22 CET—Thu 2018-11-29 10:10:07 CET
-2 646787bd244d4230a5986f00207c1e8c Sun 2019-02-24 19:50:23 CET—Tue 2019-02-26 22:49:29 CET
-1 c922041a9a3847babd51ac79dd06923c Wed 2019-02-27 08:27:28 CET—Sun 2019-03-03 08:52:52 CET
0 0aa03fbca4bf4976b922f9f77c63f65a Sun 2019-03-03 09:02:47 CET—Mon 2019-03-18 17:10:08 CET
# timestamps corresponds to universal timezone
user@node:~$ journalctl --list-boots --utc
-3 0f2fcb9569384a2aa2d5492505f86cda Tue 2018-11-27 15:45:22 UTC—Thu 2018-11-29 09:10:07 UTC
-2 646787bd244d4230a5986f00207c1e8c Sun 2019-02-24 18:50:23 UTC—Tue 2019-02-26 21:49:29 UTC
-1 c922041a9a3847babd51ac79dd06923c Wed 2019-02-27 07:27:28 UTC—Sun 2019-03-03 07:52:52 UTC
0 0aa03fbca4bf4976b922f9f77c63f65a Sun 2019-03-03 08:02:47 UTC—Mon 2019-03-18 16:10:08 UTC
UTC timezone is universal that's why it is useful to avoid any daylight saving time misunderstanding issues.
From journalctl man page :
--list-boots
Show a tabular list of boot numbers (relative to the current boot), their IDs, and the timestamps of the first and last message pertaining to the boot.
PS : in case you have only one line returned by journalctl, just create folder /var/log/journal to enable multiple on-disk journal retention
Grepping rsyslog stsrt/stops from /var/log/messages would likely suit your needs as that’s one of the first things to start and last things to stop on shutdown.
