Boot Messages
# Show all messages from this [b]oot:
$ journalctl -b
# Show all messages from last [b]oot:
$ journalctl -b -1
# Show all messages from previous_boot's_offset [b]oot:
# e.g., the previous boot has an offset of -1, the boot before that is -2, and so on
$ journalctl -b -<offset>
# To list the boots of the system, use the following command.
$ journalctl --list-boots
-2 12792aa4791f4087a27f93a2bf4e191f Sun 2021-07-04 23:34:07 +08—Sun 2021-07-04 23:34:29 +08
-1 8e10828970ac4e7ebec55f268f6e945d Mon 2021-07-05 07:36:05 +08—Sun 2021-07-04 23:37:17 +08
0 f027aa1e23c44e2c88d8203fc7f93575 Mon 2021-07-05 07:37:28 +08—Wed 2021-07-14 22:12:20 +08
