Arch Linux Tips

This is a bunch of random tips on Arch Linux.

Check last reboot

Arch does not have var/log/messages or /var/log/syslog use journalctl to find last reboot time https://wiki.archlinux.org/index.php/Systemd#Systemd_Journal

Here are two ways:

Check last reboot time using last the -x flag display system shutdown entries and run level changes

[root@nuc ~]# last -x | head | tac
brent    pts/0        100.69.216.115   Thu Dec 22 19:54 - 22:56  (03:01)
brent    pts/0        100.69.216.115   Tue Dec 27 07:01 - crash (4+17:38)
reboot   system boot  6.0.12-arch1-1   Sun Jan  1 00:39 - 05:45 (7+05:05)
shutdown system down  6.0.12-arch1-1   Sun Jan  8 05:45 - 05:45  (00:00)
reboot   system boot  6.0.12-arch1-1   Sun Jan  8 15:35 - 15:49  (00:14)
brent    pts/0        100.69.216.115   Sun Jan  8 16:17   still logged in

Or check the last reboot time using journalctl

[root@nuc ~]# journalctl --list-boots
IDX BOOT ID                          FIRST ENTRY                 LAST ENTRY
-2 d98e34fab6854e7abf9264aa6e8d15a5 Sun 2023-01-08 05:45:50 +08 Sun 2023-01-08 15:34:55 +08
-1 1f30729fcfdc46c194564dba8a89ed47 Sun 2023-01-08 15:35:30 +08 Sun 2023-01-08 15:49:56 +08
0 01042053fbb04ea5a9c5deaed328c892 Sun 2023-01-08 15:50:16 +08 Sun 2023-01-08 17:01:27 +08

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